I am hoping to recover mp4 and mov video files. I lost some iso disk images as well. I also lost a large number of .aiff and .sd files, most of which were created on Mac OS 9 and have no extension. Disk drill did not apparently detect any of these during a 3-day long deep scan of a 1TB drive.
I am not too surprised about the filetypes with no extension, but I’m surprised that Disk Drill is not configured to detect more types of movie files.
More file signatures are available in the next version which is being internally tested now. If you checked the Preferences, you would see that the list of supported file types that can be found during Deep Scan is available there. My apologies that we can’t support many more at this time 🙂