I am currently using EndeavourOS for my laptop. Is there a backup solution that is easy to use, and can be run from the EndeavourOS install media without internet? (RSync is included, but no other backup tools are included, to my knowledge.) I don’t want to use another ISO due to space constraints on my USB.
As long as you don’t reboot, your live sessions act like a fully installed OS. At least with any of the LiveUSB sessions I’ve ever used over the last decade.
You can install, mount a backup image, then push it on to a mountpoint for your actual install to be restored.