You have a couple of questions here I'll give some input on.   USB backup - I do this on my main server.  The server itself holds backups of several other systems/computers.  Weekly I back this data onto a USB drive (drive connected to server via Unassigned Devices plugin).  I have written a pretty basic script which uses rsync to copy the folders to back up to the USB drive.  I have two USB drives, and once a month I'll swap them, taking the unconnected one to store offsite at work.
    • Like
    1