I do like the idea of a nice automated backup to USB drive, that would definitely be a nice feature.
I currently use the sync module to backup to an emoncms installation that I have installed on my laptop (ubuntu OS) I appreciate this is not exactly a simple solution… I haven’t needed to use it to restore a system yet, the USB importer tool has worked a treat alongside the fsck commands when something does go wrong. Though Im aware of @promy’s recent experience with a couple of feeds that tripped up restoring using this approach Running but corrupted emonpi - #6 by promy, perhaps the importer script could be more robust and skip the corrupted feeds somehow