FolderSync selectively syncs files/folders from my phone back to my server via ssh. Some folders are on a schedule, some monitor for changes and sync immediately; most are just one-way, some are two-way (files added to the server will sync back to the phone as well as uploading data to the server). There's even one that automatically drops files into paperless-ngx' consume folder for automatic document importing.
From there BorgBackup makes a daily backup of the data, keeping historical backups for years with absolutely incredible efficiency. I currently have 21 backups of about ~550gb each. Borg stores this in 447gb of total disc space.
Pull the tab off of a pop can. Turn off the switch on the power bar that the teachers computer is plugged into. Unplug the computer, slip the pop can tab over the live+neutral prongs, plug it back into the still off power bar and wait.
The teacher goes to use their computer, finds it's not turning on and looks at the power bar.
Switch flips, 'BANG', scream, lights go out (breaker popped).