Switch -AM[s,r] - archive name and time [save, restore]
Switch -ams preserves the archive metadata, which includes the original archive name and creation time. It can be used with archive modification commands, such as A or CH.
If used together with -tk or -tl switches, -ams saves the archive modification time set by these switches.
Switch -amr renames an archive to saved name and sets the stored time as both archive creation and modification time. It can be used together with 'CH' command only, which ignores all other archive modification switches if -amr is specified.
Switch -am without 's' and 'r' modifiers is treated as -ams.
Saved metadata is displayed on "Info" page of Show information command and can be restored on Options page of same command.
Supported for RAR 5.0 archives only.
WinRAR a -am files.rar
WinRAR ch -amr myfiles.rar