I use this for all my computers.
I recently had to restore some email Thunderbird files stored in Appdata only to find Appdata had not been backed up.
After some time I found a software update that I had set to automatically update had added Appdata to my exclusions, what!
It was under a tab labelled “files/folders with partial names”. I had never checked this tab as I had never entered anything in this part.
I post this in case other users here might suffer from this problem.