I've got a Galaxy J2 with supposedly 9GB out of 16 used. I used DiskUsage and the Storage option in Settings, and to my avail I could not find all of the used space in my internal storage. The storage settings says it's 9GB of System and User Data used, but even showing hidden folders doesn't show me that. I'm not rooted, and would like to avoid that. Is there anyway to finally find, once and for good, all my used data in the internal storage?