Then I would ask on SuperUser. If you want something entirely open source and you don't mind some manual steps and this is just for you, then you could simply

Then I would ask on SuperUser. If you want something entirely open source and you don't mind some manual steps and this is just for you, then you could simply mount a USB, use cryptsetup to encrypt it and use rsnapshot to copy your files over. Rsnapshot will create deltas of only changed files, which means rolling back to a date is easy and disk usage is minimal (just your initial data-set + change delta) Your distro likely already has cryptsetup and rsnapshot in its repos. You asked for a GUI though, so I think your best bet is SuperUser. They will be on top of all the latest open source backup solutions that have a GUI. [1] - https://github.com/rsnapshot/rsnapshot https://github.com/rsnapshot/rsnapshot