05-28-2017, 08:10 AM
34.39 MB doesn't seem right unless most of your songs share a file. If you have 560+ individual files, then ~650MB seems more reasonable. You can look at the backup file in the companion app and extract all of the files if you want to try to identify if any are missing. If you have a second device, you can restore the backup file on that one and then using the "Find Missing Files" utility to see if any files are missing.