I went through and put check marks next to everything. Then turned on backup status overlays. After the backup I browsed a few folders and found some file that were not being backed up. Quickbooks transaction file, XML files, and some others. I just figured out that the office .dic files are not being backed up either. I added the extensions to the list of things to backup. Autocorrect files (.acl)? Outlook nicknames (.nk2)? Nope, neither of those is being backed up. ARRGH!
Now I'm asking myself "How do I find out what else is not being backed up?". There is a Preview button that shows what files WILL be backed up. But, there is no button to show what is NOT being backed up. Am I missing something? Or do I have to go through every folder looking for missing backup overlays? You should realize that most users won't even know they are not fully backed up until they are unable to fully restore their data. That is especially true if the software they use uses odd file types (like PagePlus .ppp files).