Conversion of thumbdata3 files to jpg file format

There is really no way how you could get a JPG picture out a THUMBDATA3 file. It is just a cache file that contains thumbnail data for a picture that exist, or once existed in your Android phone. The problem is in the fact that .thumbdata3 file contains data from ALL pictures, not just single one, so there is no way how to get a single one, even in thumbnail form.

Open THUMBDATA3 file    Open JPG file