How to Backup and Restore Linux System Using TimeShift
Timeshift is an open-source system restore tool that creates incremental filesystem snapshots using either of 2 modes: BTRFS snapshots or rsync+hardlinks.
With it, you can schedule backups at multiple levels using filters and the backups can be restored from Live CD/USB or directly from the system while it is running.
The goal of Timeshift is to maintain the history and integrity of your file system files and settings and not to back up your media files or documents. To do that, you will need a different backup app.