My MobilitySync folder has a lot of old backups from 2011, 2012, etc. I don't current own any iDevices that I owned back then. Is is OK to delete these folders? The individual files are not big but the sum of them is well over 200GB. So I'd love to reclaim that space if these are useless files and not connected to any current backup. I only do iTunes backups, not iCloud.