I noticed yesterday that I only had 3gb left on internal storage. After some searching with Astro I found the thumbnails folder under DCIM was 6GB. There were many thumbnails in there, but when I deleted them it didn't make that much difference in the size of that folder. I selected "show hidden files" but nothing showed up in there. I deleted the folder and I regained the 6gb on my internal storage. I went back in there today and that folder was 3gb. I'm going to try another Gallery app instead of the stock one to see if it makes a difference? Anyone heard of that?