Both my wife and I have an S3 i9300. Mine is 15 months old, my wife has had her S3 for only three months now. Devices are not rooted. On my previous Galaxy S phone I have mucked about a lot with custom ROMs. but this phone works so well I've not found it necessary to interfere.
However, for some time now, the Device Memory of my wife's phone has been almost completely filled up.
Out of 16 Gb she has about 650 Mb left (my older phone still had 6.3 Gb). So with 4.6Gb of System memory and some Cache and Misc., there's over 10 Gb of "stuff" on her phone. In Android 4.3 (previous, 4.2.1(?) wouldn't even calculate it) the Storage tab told us there was almost 10Gb of photos and videos on the phone as can be seen in the attached photo.
In the Gallery it showed a 1000 Picasa pictures. Too round a number so it might be more. My wife threw those out of Picasa on the PC and afterwards closed the sync options on the phone. Then we stopped the gallery, emptied the cache and deleted the data. Now the Picasa pictures are no longer in the Gallery, there's about 60 pics left in there, Can't be more than 200 Mb. But according to the Storage tab there's still 10 Gb of photo's on the phone! Not only is this phone slower than mine, it sometimes even crashes. We rebooted the phone a number of times.
I can't find those files! They're not in either SDcard, not in the level up from there marked "/" in the file manager. As the phone is not rooted and my wife doesn't want it mucked about with, I can't go further than that.
My phone is a year older and I take way more photo's than her and I have 120Mb of 'em on my phone. Other sections of the memory like the System Memory are comparable to mine in size, or way smaller, like she has less than half the number of apps I have.
My wife is an MD, she uses the phone often for patient calls. She is very dependent on it. So she doesn't want me to muck about with it. Doesn't want it rooted. Also she doesn't look forward to doing a factory reset and reinstalling the lot. Especially redoing the homescreens. She has a lot of them, which seems to work for her, but is timecomsuming to redecorate. Then there's re-freezing the apps Google and Samsung seem to deem necessary to have on there that we don't use. Without option to remove. And it might not even work, since factory reset usually leaves your personal stuff (music, documents, photo's, etc) alone.
Does anyone know how to find/remove these files?