Relax And Recover for os level backups. https://relax-and-recover.org/
With rear you can back up your system to pretty much anything. Mounted volume, USB drive, even to a bootable iso.
I use weekly rear backups for my system, and hourly Borg backups for diffs/point in time restore of user data, but you could use rear for an entire system snapshot as well.
The entire “Organize the store by Brand™” rather than by product is a terrible consumer experience. Truly a horrible idea made by horrible profiteers.
Want to compare and buy an SD card? You need to go to the SanDisk section, the Samsung section, and the Other Misc Junk section. And btw the sections are on opposite corners of the store. Ain’t nobody got time for that.