Hello m4ri0g,
I have just tested it. Backups of several profiles on one USB drive are possible.
There is the folder “.SeedVaultAndroidBackup” on the USB drive.
And seedvault creates a separate subfolder for each profile. So that they can coexist without any problems.
If you back up a profile for which a backup already exists, this existing backup is deleted and replaced by the new one, but the backups from the other profiles are not touched.
Please note: if you switch between profiles, you must always disconnect and reconnect the USB drive, otherwise the new profile cannot access the USB drive.
When restoring, simply enter the 12 words of the profile from which you want to restore the backup. There is no direct selection option.
12 words of profile A => backup from profile A will restored.
12 words of profile B => backup from profile B will restored.