if you are referring to the older systems that don't have a flash drive (Floppy drives only);
If they are on the network and you can access via Rlogin, then you can use WinSCP to back up the FLOPPY Drive. If you need to restore it, you would copy everything back on to a clean floppy.
It will take a little tinkering to get the login just right, and you'll select either /F1 or /F0
depending on the date of the last system backup to floppy.
I use this method to back up my 61c to my laptop for offsite copies; and then copy that to the cloud storage.
30n30w