A portable NVMe SSD packs M.2-class flash into a pocket-sized shell, and as of October 25, 2026 the newest mainstream examples come from Samsung. The Portable SSD P9 and Portable SSD P7 reached stores in September 2026 on a USB4 Gen 3×2 link. Both carry a rated read speed of up to 4,000 MB/s, which is double the 2,000 MB/s rating on Samsung’s older T9, according to the T9 listing on Samsung’s US store.
Samsung unveiled the pair at Gamescom on August 26, 2026, and early launch coverage led with the 4,000 MB/s headline. That headline is a peak figure. What decides whether a drive feels fast on a long video export or a full-library backup is the write speed after the drive’s fast cache fills, and Samsung publishes that number for only one of the two new models.
This comparison puts the P9, the P7 and the T9 side by side on interface, rated speed, sustained write, price and fit. It also sets them against the Thunderbolt 5 and USB4 80Gbps drives that cost more, and it ends with a migration plan and a script for checking sustained write on your own unit. If you want a wider view of what people pay for these drives, the site’s portable NVMe SSD price tracker covers street prices across brands.
Short answer: pick the P9 if your jobs write for minutes at a stretch, pick the P7 if your files are small or your writes come in bursts, and keep the T9 in mind if your laptop tops out at a 20Gbps port. The sections below show the numbers behind each call.
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What a portable NVMe SSD actually is, and why it beats SATA-class drives
Inside a portable NVMe SSD sits the same kind of flash and controller you would find on an M.2 stick in a laptop, plus a bridge chip that translates between the drive’s PCIe lanes and a USB-C or Thunderbolt port. Older portable drives used SATA flash behind a 10Gbps USB link, which capped real transfers at a fraction of what modern flash can do. NVMe removes that ceiling on the storage side and moves the bottleneck to the cable, the bridge chip, the heat budget and the flash itself.
That shift explains why two drives with the same 4,000 MB/s sticker can behave very differently under load. The link sets the ceiling. The controller and NAND set the floor. The enclosure’s ability to shed heat decides how long the drive can hold its best speed before it backs off to protect itself.
The three layers that set real-world speed
Think of a portable NVMe drive as a stack. At the top is the host port on your computer, which may be USB 3.2 Gen 2×2 at 20Gbps, USB4 at 40Gbps, or a USB 80Gbps or Thunderbolt 5 port at 80Gbps. In the middle is the drive’s controller, which moves data between the port and the flash. At the bottom is the NAND, which has a fast cache region and a slower bulk region. A weak layer anywhere in that stack caps the whole drive.
Most buyers only look at the top layer because it is printed on the box. The site’s Thunderbolt 5 vs USB4 vs USB 3.2 portable SSD breakdown goes deep on that top layer, so this article spends more time on the bottom two.
Why the M.2 label matters less than it sounds
Readers searching for a portable M.2 SSD usually mean one of two things. Some want a finished pocket drive that uses NVMe flash. Others want to buy a bare M.2 stick and drop it into a USB4 or Thunderbolt enclosure. Both routes end up with the same architecture. The finished drive trades flexibility for tuning, since the maker picks the controller, the cache policy and the thermal design as a set. The DIY route hands those choices to you, which we cover in a later section.
Samsung P9 vs P7 vs T9: the lineup at a glance
Samsung’s current portable range has three drives that matter for this comparison. The P9 and P7 are new, share a USB4 Gen 3×2 interface and ship in 1TB, 2TB, 4TB and 8TB capacities. The T9 arrived earlier on USB 3.2 Gen 2×2, and Samsung’s US catalog still listed it in the third week of October 2026 with no successor announced. Samsung said on October 8 that the P9 and P7 are the first products in a new generation of portable SSDs and that it would keep expanding that generation, so a wider P-series family is the stated direction.
The table below sets the two new drives against each other using Samsung’s own announcement and product pages. Prices are the launch MSRPs Samsung published on August 26, 2026. Street prices move, and the pricing section covers where they sit now.
| Spec | Samsung Portable SSD P9 | Samsung Portable SSD P7 |
|---|---|---|
| Official interface name | USB4 Gen 3×2 | USB4 Gen 3×2 |
| Capacities | 1TB, 2TB, 4TB, 8TB | 1TB, 2TB, 4TB, 8TB |
| Peak sequential read | 4,000 MB/s | 4,000 MB/s |
| Peak sequential write | 3,800 MB/s | 3,700 MB/s (1TB), 3,800 MB/s (2TB and up) |
| Stated sustained write, 1TB | 1,000 MB/s | Not published |
| Stated sustained write, 2TB to 8TB | 2,000 MB/s | Not published |
| Launch MSRP, 1TB | $339.99 | $289.99 |
| Launch MSRP, 2TB | $649.99 | $549.99 |
| Launch MSRP, 4TB | $1,349.99 | $1,149.99 |
| Launch MSRP, 8TB | $2,699.99 | $2,289.99 |
| Unveiled | Gamescom, August 26, 2026 | Gamescom, August 26, 2026 |
| Commercial launch | September 2026 | September 2026 |
| Drop resistance and warranty | Up to 2 m, five-year limited (regional product information) | Up to 2 m, five-year limited (regional product information) |
| Direct 12K recording claim | Yes, per Samsung | Not claimed |
| Award | CES 2026 Innovation Award | Not listed |
Two rows deserve a second look. First, the peak write numbers sit within 100 MB/s of each other, so a short copy will feel identical on both. Second, the sustained-write rows show the real gap in how Samsung describes the two drives. For a head-to-head against rival brands, see the site’s Samsung P9 vs LaCie vs SanDisk comparison.
Interface tiers: 20Gbps, 40Gbps and 80Gbps explained
Port naming has been a mess for years, and 2026 is the year the industry started cleaning it up. A secondary industry report says USB-IF now pushes speed labels such as USB 40Gbps and USB 80Gbps instead of version numbers. The direction is clear, though. When a box says only USB4, it does not tell you whether the port runs at 40Gbps or 80Gbps.
| Tier | Link rate | Where you meet it | What limits sustained writes |
|---|---|---|---|
| USB 3.2 Gen 2×2 | 20Gbps | Samsung T9 and similar older portable drives | The link first, then NAND and controller after the cache fills |
| USB4 Gen 3×2 (USB 40Gbps) | 40Gbps | Samsung P9 and P7 | NAND, controller and heat |
| USB4 Version 2.0 (USB 80Gbps) | Up to 80Gbps bidirectional, with an optional 120Gbps one-way mode and 40Gbps in reverse | Early drives and enclosures, including Oyen Digital and Glyph models | NAND, controller and heat, plus thin host support |
| Thunderbolt 5 | 80Gbps bidirectional, up to 120Gbps in Bandwidth Boost for display traffic | Mac Studio ports, OWC and Sabrent drives | NAND, controller and heat, with storage transfer quoted up to 64Gbps |
| Signaling | PAM3 on USB4 Version 2.0 | Cables and ports | Cable quality matters more at 80Gbps |
| Fallback behavior | Thunderbolt 5 falls back to Thunderbolt 4, Thunderbolt 3 and USB4 | Mixed-port households | The slowest link in the chain wins |
One point trips up buyers constantly. The 120Gbps figure attached to Thunderbolt 5 and USB4 Version 2.0 describes a display-oriented mode, not a storage write speed. For storage, the practical Thunderbolt 5 figure is the up-to-64Gbps transfer bandwidth that vendors such as Sabrent quote. Nor does a Thunderbolt 5 label mean every host and every drive sustains an 80Gbps class transfer.
For a closer look at how a 20Gbps drive and a faster-link drive from one brand differ in daily use, the SanDisk USB4 vs 20Gbps portable SSD comparison runs the same question on another vendor’s lineup.
Sustained write: the number that matters after the cache fills
Every modern consumer SSD uses part of its flash as a fast cache, writing one bit per cell while empty and then folding that data into denser storage when the drive is idle. A copy that fits inside the cache runs at the headline speed. A copy that overflows it drops to whatever the denser flash and the controller can sustain. Peak numbers describe the first case and sustained numbers describe the second.
Samsung’s published P9 figures are unusually direct on this point. The company states a sustained write level of 1,000 MB/s for the 1TB P9 and 2,000 MB/s for the 2TB, 4TB and 8TB models. Samsung also describes the P9 as having “strong sustained write performance” and ties it to direct 12K recording, though the announcement does not state the cache size or a full-drive test result.
Why the 1TB model sustains half the speed of the 2TB
Capacity matters because flash speed scales with the number of chips working in parallel. A 1TB drive has fewer dies to spread writes across, so its bulk write rate is lower. That pattern shows up in Samsung’s own numbers, and it is the main reason to avoid the smallest P9 if your plan involves long video captures. If your files are small, the 1TB model remains a fine buy.
What Samsung has not published for the P7
Samsung’s pages for the P7 list the peak sequential figures but, in the material reviewed for this article, no sustained write rate after the cache fills. That does not prove the P7 is slow. It does mean you cannot rank it against the P9 or against a Thunderbolt 5 drive on post-cache writes using official data alone. Until independent full-drive tests land, the safe reading is that the P7 matches the P9 for bursts and may trail it on long writes.
The same caution applies to the T9. Samsung markets it with sustained read and write performance of up to roughly 2,000 MB/s, yet the official excerpts reviewed here do not give a post-cache write rate or a cache size. Treat any blog that quotes a precise T9 cache figure with suspicion unless it names a test and a capacity.
Heat, cables and ports: the hidden speed limits
Even a drive with a good sustained rate can fall short if the rest of the chain lets it down. Three culprits show up again and again in support forums, and none of them appear on a spec sheet.
Heat
NVMe controllers throttle when they get hot. A portable shell is small, and it sits on a desk or in a bag with little airflow. The longer a write runs, the more likely the drive is to step down to protect itself. This is one reason a long sustained test matters more than a ten-second benchmark. If you plan to record video for an hour, put the drive on a metal surface or clip a small fan nearby, and watch the speed log for a second step down after the first.
Cables
A USB-C cable can look identical and carry a very different data rate. At 40Gbps and above the cable is part of the link, and a cheap charging cable can drop the connection to a slower mode without any warning. Use the cable that ships in the box, or buy one certified for the speed you need. The new PAM3 signaling that USB4 Version 2.0 uses to reach 80Gbps makes cable quality matter even more.
Host ports
Many laptops carry a mix of ports. One USB-C socket may run at 40Gbps while its neighbor runs at 10Gbps, and the labels are often tiny or absent. Check your computer’s manual or spec page before you buy a drive for its speed. As USB-IF’s own guidance implies, the word USB4 alone does not establish 80Gbps capability, and the same logic applies to a laptop’s port labels.
Published performance figures: what five sources actually say
Independent, controlled benchmarks for the newest drives are still thin. So this section lays out what each named source publishes, flags whether the figure is a peak or a sustained claim, and leaves the ranking to the reader. All of these are vendor-published numbers unless stated otherwise.
- Samsung newsroom, August 26, 2026: P9 and P7 rated up to 4,000 MB/s read. The P9 is described as the world’s first 8TB USB4 portable SSD at that speed. Peak figures only.
- Samsung regional product pages, September 2026: P9 sustained write of 1,000 MB/s on 1TB and 2,000 MB/s on 2TB and up. This is the one post-cache figure in the family.
- Samsung US listing for the T9, October 2026: up to 2,000 MB/s read, with write listed at 1,950 MB/s on the 2TB model in one reading of the page. Where sources conflict we use the lower figure.
- Oyen Digital product page, October 2026: the U35 Bolt+ USB4 80Gbps drive is advertised at up to 6,000 MB/s, a peak figure on a faster link.
- USB-IF and Thunderbolt specifications: link ceilings of 80Gbps bidirectional, which describe the road and not the car.
Read together, the sources tell a consistent story. Peak numbers rise with the link, from roughly 2,000 MB/s on a 20Gbps drive to 4,000 MB/s on the 40Gbps P-series to a 6,000 MB/s claim on an 80Gbps drive. Sustained numbers are far less visible. Only Samsung’s P9 pages commit to one. That gap is the reason the test script later in this guide exists.
To see how Thunderbolt 5 flagships stack up against SanDisk and LaCie on the same kind of vendor figures, the OWC Envoy Ultra vs LaCie vs SanDisk comparison is the closest companion piece.
Pricing: launch MSRPs, cost per terabyte and current deals
Samsung announced US launch prices on August 26, 2026. The table converts them to cost per terabyte and shows what the P9 premium works out to at each size. Cost per terabyte is our own arithmetic on Samsung’s published MSRPs, rounded to the cent.
| Capacity | P7 launch MSRP | P7 per TB | P9 launch MSRP | P9 per TB | P9 premium |
|---|---|---|---|---|---|
| 1TB | $289.99 | $289.99 | $339.99 | $339.99 | $50.00 |
| 2TB | $549.99 | $275.00 | $649.99 | $325.00 | $100.00 |
| 4TB | $1,149.99 | Not listed | $1,349.99 | Not listed | $200.00 |
| 8TB | $2,289.99 | Not listed | $2,699.99 | Not listed | Not listed |
One thing stands out. The 2TB models are the cheapest per terabyte in both lines. The P9 also costs more than the P7 at every size, which fits the sustained write levels Samsung states for it.
Prices have drifted since launch
Samsung’s US pages on October 24, 2026 showed slightly different P7 numbers than the August MSRPs, according to the retrieval reviewed for this article. The 1TB P7 showed $285.99, the 4TB showed $1,199.99 and the 8TB showed $2,399.99, while the 2TB stayed at $549.99. The same pages listed the 4TB P9 at $1,439.99 and the 8TB P9 at $2,879.99. Because those figures come from a single pass over the live store, check the page before you buy. Flash prices have been unsettled this year, which the site covered in its look at the portable SSD price gap between budget and premium picks.
The T9 is where the deals are. Samsung’s US store listed the 2TB T9 at $489.99, and SamMobile reported a $40 cut on October 22, 2026, which brings the 2TB to $449.99. That is a hundred dollars below the 2TB P7 at its list price, for half the rated read speed.
Outside the US, rollout is still under way. Samsung announced the P7 in Indonesia on October 21, 2026, with availability slated for early November, so readers in Southeast Asia may see local pricing later than American buyers.
Samsung P9 vs P7: is the 17 percent premium worth paying?
On paper the two drives share everything but two things. The P9 posts a 3,800 MB/s write rating at every capacity, while the 1TB P7 posts 3,700 MB/s. And the P9 comes with a stated sustained write floor and a 12K recording claim, while the P7 comes with neither. If the premium buys only the paper differences, it is a poor deal for most people. If it buys a drive that holds 2,000 MB/s through a long copy, it is a bargain for the people who need that.
We can reason about who falls on which side without inventing numbers. A photographer who offloads a memory card writes mostly inside any decent cache, so the P7 serves them well and saves $100 at the 2TB size. A colorist copying a very large project folder, or a video editor who records straight to the drive, spends real time past the cache boundary, and the P9’s floor turns into minutes saved on every job.
The case for the P7
The P7 gives you the same 4,000 MB/s read rating, the same capacities, the same drop and warranty terms and a lower price at every size. For game libraries, photo catalogs, project archives and general backups, read speed matters more than long writes, and the P7 delivers it. Its main risk is the missing sustained figure, which means you are buying with less information.
The case for the P9
The P9 is the drive with a documented answer to the question this article keeps asking. It states what the drive sustains, it ties that to a professional use case, and the P9 line earned a CES 2026 Innovation Award. Buyers who care about predictability pay the premium for that clarity as much as for the speed.
Where the T9 and other 20Gbps drives still make sense
The T9 is not obsolete. Samsung’s newer USB4 portable SSDs appear to be positioned alongside it and not as a documented replacement, and the T9 USB 3.2 Gen 2×2 still appears on Samsung’s US site. That is a signal to watch and not a retirement notice.
For many buyers the T9’s 20Gbps link is a better match than a faster drive. If your laptop’s USB-C port tops out at 20Gbps, a P-series drive will run at the port’s limit and you will have paid for speed you cannot use. The site’s Samsung T9 vs SanDisk Extreme vs Crucial X10 Pro comparison covers how those older-generation rivals line up on price.
One practical wrinkle: the T9’s rated speeds read 2,000 MB/s in some places and 2,000 MB/s read with 1,950 MB/s write in others. We use the lower write figure whenever we need one.
Beyond Samsung: USB4 80Gbps and Thunderbolt 5 portable drives
The faster tier exists, but it is small and expensive. The USB4 Version 2.0 specification is finalized, and USB-IF’s document library lists USB4 Specification v2.0 dated April 2, 2026. Industry reporting says controllers from companies such as ASMedia and VIA Labs were expected around late 2026 or early 2027, which is a reported plan and not a confirmed shipping date. Retail 80Gbps products so far skew toward cables and M.2 enclosures, with a handful of finished drives.
The named 80Gbps and Thunderbolt 5 drives
- Oyen Digital U35 Bolt+: a USB4 80Gbps portable drive. Oyen’s product page lists the 1TB model at $429 and advertises up to 6,000 MB/s.
- Glyph Atom EX80: announced as a USB4 80Gbps portable NVMe drive with an 80Gbps USB-C port and compatibility with Thunderbolt 5, 4 and 3 hosts. No official price was confirmed.
- OWC Envoy Ultra: a bus-powered Thunderbolt 5 drive. OWC announced an 8TB version, described as the first bus-powered 8TB Thunderbolt 5 drive, with the range starting at $449.99 and the 8TB model at $1,699.99 according to OWC’s January 2026 pricing. Third-party figures conflict on current street prices.
- Sabrent Rocket XTRM 5: a bus-powered Thunderbolt 5 portable drive listed on October 23, 2026 in a 2TB version, with an advertised 80Gbps connection and up to 64Gbps of transfer capability.
For more on how the Thunderbolt 5 drive and enclosure market lines up, see the Thunderbolt 5 SSD comparison of Sabrent, OWC and bare enclosures.
Prebuilt drive or DIY M.2 enclosure?
An enclosure plus a bare M.2 stick costs less on paper and gives you control over the flash. OWC’s Express 1M2 80G was listed on October 20, 2026 as a Thunderbolt 5 compatible USB4 NVMe enclosure, and reporting from early October put its list price at $219. ACASIS enclosures tracked around $199.99 to $209.99 on marketplaces on October 10, though those are tracked prices and not official MSRPs. Those enclosure prices exclude the SSD, so the total lands near a finished drive once you add flash.
The DIY route wins on repairability and on the freedom to swap in a better stick later. It loses on tuning, since a prebuilt drive’s maker has already matched the controller, cache policy and thermal design. The site’s DIY NVMe enclosure vs portable SSD comparison and the Sabrent vs ORICO vs UGREEN vs ACASIS enclosure test go deeper on that trade.
Real-world examples: six workloads and the drive that fits
Specs only help when they map to a job. These six scenarios use the verified facts above and apply them to common buyer situations. They are reasoned scenarios and not lab results.
1. A Mac Studio editor with six Thunderbolt 5 ports
Apple announced Mac Studio models with M5 Max and M5 Ultra on August 25, 2026, with up to six Thunderbolt 5 ports and up to 120Gb/s of advertised bandwidth, according to Apple’s newsroom. A machine like that can feed an 80Gbps-class drive, so a Thunderbolt 5 SSD is worth the money. A P9 still works fine on one of those ports, just at its own 40Gbps-class limit.
2. A filmmaker recording 12K to a drive
Samsung positions the P9 for direct 12K recording. A recorder writes continuously for minutes at a time, so it blows past any cache. Here the P9’s stated floor of 2,000 MB/s on 2TB and larger models is the relevant number, and the 1TB model’s 1,000 MB/s is the one to avoid. Check your camera’s required write rate against that figure before buying.
3. A photographer offloading cards in the field
Card offloads arrive in bursts. A P7 at 2TB handles that inside its fast region, costs $100 less than the P9 at launch pricing, and carries the 2 m drop rating Samsung lists in its regional product information. This is the P7’s best use case.
4. A handheld gamer expanding a library
Game installs are read-heavy, and handhelds rarely expose a port faster than 40Gbps. A P7 or even a T9 on sale gives you plenty of read speed. The site’s external SSD dock setup for Steam Deck and ROG Ally walks through the hardware side.
5. A developer shuttling VM images and build caches
Disk images are big and move often. That is a mid-length write, which sits between the photographer and the filmmaker. A 2TB or larger P9 keeps the floor high without paying Thunderbolt 5 prices.
6. A small office doing weekly full backups
Backups run overnight, so peak speed barely matters. A discounted T9 at $449.99 for 2TB or a P7 gives the capacity at the lowest cost. Buy two and rotate them.
Use-case recommendations: which portable NVMe SSD to buy
- Long video capture or large project copies: Samsung P9 at 2TB or larger, for the stated 2,000 MB/s sustained floor.
- Everyday creators with bursty writes: Samsung P7 at 2TB, which has the lowest cost per terabyte of the new pair at $275.00 on launch pricing.
- Budget backups and cold storage: Samsung T9 on sale, or a second P7, whichever is cheaper per terabyte on the day.
- Mac Studio or Thunderbolt 5 workstations: an OWC Envoy Ultra or Sabrent Rocket XTRM 5 if you will actually use the link, since the host can feed them.
- Tinkerers who want to choose their own flash: a USB4 or Thunderbolt enclosure with a bare M.2 stick, accepting that tuning is on you.
- Anyone with a 20Gbps-only laptop: a 20Gbps drive, because a faster drive cannot exceed your port.
Pros and cons of each option
Samsung Portable SSD P9
- Pros: the only drive in the family with a published sustained write figure, an 8TB option, 12K recording positioning, a CES 2026 Innovation Award and a five-year limited warranty.
- Cons: a higher price than the P7 at every size and a 1TB model that sustains only 1,000 MB/s.
Samsung Portable SSD P7
- Pros: the same 4,000 MB/s read rating as the P9, a lower price at every capacity, and the lowest cost per terabyte at 2TB.
- Cons: no published sustained write, a 1TB write rating 100 MB/s below the P9, and no 12K claim.
Samsung Portable SSD T9
- Pros: still in the current catalog, a recent $40 promotion, a good match for 20Gbps ports, and no successor announced.
- Cons: half the rated read speed of the P-series, no stated sustained write, and an older platform.
Thunderbolt 5 and USB4 80Gbps drives
- Pros: the highest link headroom, a strong fit for Mac Studio class machines, and advertised speeds up to 6,000 MB/s on the Oyen U35 Bolt+.
- Cons: costly, thin host support, a young market with few independent post-cache tests, and a 120Gbps mode that is not a storage speed.
Migration guide: moving from an older portable drive
Upgrading is mostly a copy job, but a few steps prevent the usual disasters. Work through this list in order.
- Check the host port first. Look up your computer’s USB-C or Thunderbolt port speed. If it is 20Gbps, a T9 or P7 will perform the same as pricier drives.
- Use the cable in the box. A 40Gbps or 80Gbps link needs a certified cable, and a cheap charging cable can silently drop the link to a slower mode.
- Format for your platform. exFAT works on Windows, macOS and many consoles. Use APFS for Mac-only workflows and NTFS for Windows-only ones.
- Copy, do not drag. Use a tool that resumes and verifies, as shown below.
- Verify checksums. Compare hashes on a sample of large files before you wipe the old drive.
- Keep the old drive for a week. Use it as a second backup, then erase it.
On Windows, robocopy handles large trees well:
robocopy E:\ F:\ /E /COPY:DAT /R:2 /W:2 /MT:8 /LOG:C:\temp\migrate.logOn macOS or Linux, rsync preserves metadata and can resume after an interruption:
rsync -avh --progress /Volumes/OLD/ /Volumes/NEW/
# verify a sample after the copy
shasum -a 256 /Volumes/OLD/project.mov /Volumes/NEW/project.movTest sustained write on your own drive
Because published sustained numbers are rare, run your own test within the return window. The free fio tool writes a large file and logs bandwidth every second, so you can see exactly where the drive leaves its cache. Size the file to about 80 percent of the drive’s capacity so the test must outlast any cache. The example below suits a 1TB drive and assumes the volume is mounted at /mnt/ssd.
fio --name=sustained --filename=/mnt/ssd/fio.test --rw=write --bs=1M \
--size=800G --iodepth=8 --direct=1 --ioengine=libaio \
--write_bw_log=sustained --log_avg_msec=1000
# on Windows swap the engine
# --ioengine=windowsaioPlot the bandwidth log and look for a step down. The height of the first plateau is the cache speed, the height of the second plateau is the sustained write, and the position of the step along the time axis tells you roughly how big the cache is. Run the test with the drive at room temperature, then again after ten minutes of load, to see whether heat pulls the second plateau lower. If you own a P9, compare the second plateau against Samsung’s 1,000 or 2,000 MB/s claim for your capacity.
Delete the test file when you finish, and never run a full-drive write test on a drive holding data you have not backed up.
What to watch next in portable NVMe storage
Three threads will shape the next few months. First, Samsung’s stated plan to broaden the P-series suggests more capacities or tiers, though no specific model has been announced and nothing in the sources reviewed points to an 80Gbps or Thunderbolt 5 version of the P9 or P7. Second, controller makers are expected to ship USB4 Version 2.0 silicon around late 2026 or early 2027 according to industry reporting, and that is what would pull 80Gbps drives from boutique price points toward the mainstream. Third, independent reviewers will eventually run full-drive write tests on the P7 and P9, and those results will either confirm Samsung’s sustained numbers or move them.
Until then, buy on what is documented, keep the return window open, and run the fio test. A drive that holds up under your own workload is worth more than any chart.
Verdict: which portable NVMe SSD wins in October 2026
The Samsung Portable SSD P9 wins for anyone whose workload outruns a cache. Samsung states a sustained write figure for it, 1,000 MB/s at 1TB and 2,000 MB/s at 2TB and up, and it costs more than the P7 at every size. Buy it at 2TB or larger and skip the 1TB model if your writes run long.
The Samsung Portable SSD P7 wins on value. It launched at a lower MSRP than the P9 at every capacity, which also gives it the lower cost per terabyte of the new pair. The T9 wins on price, particularly while the $40 promotion lasts. The 80Gbps and Thunderbolt 5 drives are worth a look only if your host port can feed them and your budget allows it. For the wider picture, browse the hardware category for new storage and interface coverage.
FAQ
Is the Samsung P7 faster than the T9?
On rated peak speed, yes. Samsung lists the P7 at up to 4,000 MB/s read and 3,700 to 3,800 MB/s write, and the T9 at up to 2,000 MB/s according to its US listing. Your port limits the result, though. On a 20Gbps port the two will look much closer.
Does the Samsung P9 slow down after its cache fills?
Samsung’s own figures say yes, in a controlled way. It states a sustained write of 1,000 MB/s on the 1TB P9 and 2,000 MB/s on the 2TB, 4TB and 8TB models, against a 3,800 MB/s peak.
Is 120Gbps a real storage speed for Thunderbolt 5 or USB4 Version 2.0?
No. The 120Gbps figure describes a one-way display bandwidth mode. Storage transfers are quoted at up to 64Gbps for Thunderbolt 5 drives such as Sabrent’s, and real results depend on the flash, controller and heat.
Has Samsung retired the T9?
No retirement has been announced. Samsung’s US catalog still listed it in October 2026, and the new USB4 drives sit alongside it. A May 2026 Samsung Germany notice about restructuring the external-storage range is worth watching for renamed models.
Which capacity of the P9 should I buy?
Go with 2TB or larger if you write long files, because Samsung’s stated sustained rate doubles from 1,000 to 2,000 MB/s at that size. The 2TB model is also the cheapest per terabyte among the P9 sizes at its $649.99 launch price.
Can I use these drives on an older USB port?
USB-C drives generally negotiate down to the speed of the slowest link, so they will work but at reduced speed. Thunderbolt 5 hosts fall back to Thunderbolt 4, Thunderbolt 3 and USB4. Check your computer’s port specification before you pay for speed it cannot deliver.
What does USB-IF call these speeds now?
USB-IF’s consumer-facing direction uses speed labels such as USB 40Gbps and USB 80Gbps rather than version numbers. Check each product’s certification and speed label, since the word USB4 alone does not establish 80Gbps capability.
