Correction, sorry, my 1st question, wondering about an advanced setting how adding XiiaLives data base under the memory card helps, or not, lol, that's the part I left out, how does it help ect. I thank you for ur time, and again, love the app!

I'm assuming your question is what is the option "backup & restore" for under Advanced users?

If that's your question:  Backup & restore is used to backup your favorites and tags.  You might have a nice collection of favorites and tags that you don't want to loose in the event of a possible database corruption due to unknown reasons. Also, this option is nice if you want to switch phones and want to carry those favorites and tags to the new phone.