Earlier today my phone flashed a message about low memory. After some time looking around I noticed of the 10GB this phone has I was using 97% which was impossible as I didn't have that many apps loaded. It also was starting to lag. I made the decision to do a factory reset. After doing so I checked the On Phone Storage tab in the apps menu. The pic is showing I'm using 7GB of storage with no apps listed. Can anyone explain how this is this possible?