I'm aware that a similar question has been brought up already about Debian, though I'll be using Arch instead, and I'm looking for the inverse of the same question. (I haven't installed just yet) The reason that I'm looking for folders not to back up is because I'll be using Btrfs snapshots, which more easily exclude folders than include them.
Just to clarify, I'm interested in knowing which folders I should explicitly not back up, where restoring a backup of such folders might:
- damage the system, or cause certain programs to not work correctly
- be erased, inaccessible, or otherwise become useless when backed up
If there are other folders which don't fit in the above categories but are worth mentioning, I'd like to know about those as well.