In my Moto G 2Gen 16GB, Marshmallow, it tells me that under the storage& USM section
Total used of 16.00GB
Android OS 3.10 GB
Internal storage 10.95GB used of 12.90GB
If I add up the GB it shows in in internal Storage I get 6.8 GB.
So if there is 16GB - 3.10 Android OS= 12.90GB, so thats ok.
But where is the difference between the 10.95GB internal storage used to the total of 6.8GB Android sees (or shows) in internal storage?
Sounds complicated, unfortunately I was not able to upload a print screen...