To tell you the truth, the majority of the stuff I install are on external hard drives as Deb Files. I don’t keep any of my YouTube videos that I make. I backup games through Steam, onto external hard drive. I have over the years made backup copies of my system, but have come to the conclusion, that I don’t really keep anything on my computer that is important enough to worry about, or for the necessity to actually backup everything. People I swear panic and have a obsessive need to keep backing up their computers. What is so important to you? keep photos off of your daily driver and store them else where, like a external hard drive. I have my whole music collection in mp3 format on a 2TB drive, photos stored on there too, Linux OSes galore, notes of Terminal commands and other tweaks.
Yes as the collection of new info to keep comes my way, in the next few years will have to buy another external storage device. It’s that point I’m trying to make, with backing up computers all the time, sooner or later you’re going to have to make backups, of those backups, in order to save room on the storage device you backed the original up on in the first place. Are people that paranoid about security and privacy, that they have to backup everything they do in their waking lives?