Thanks Meter 631
Join Date: Sep 2011
Location: Niagara Falls ON Canada
This is all the data and info that you've backed up using Clockworkmod recovery. This is one of 6.0.1 "update". Apparently, this will save you some storage when you backup up multiple ROMs. Don't delete it, or the restoring would not be successful. If you want to delete a backup, either delete using file explorer or ROM manager. Then you reboot to recovery. Then the recovery will delete certain portion of the data in blob file that matches the deleted backup.
personally don't like it, so I use TWRP
Hope this answered your question
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