It appears that once or twice a year, my iPod will fail to transfer files to the PC successfully, followed by Recuva failing miserably. See the link below for more info
http://forum.piriform.com/index.php?showtopic=27178
Here's what happened this time. Copying a about a dozen short video clips from the nano to the PC (Windows 7x64, updated to current) using TeraCopy. After one file finishes, the USB device disconnected noise starts, immediately followed by the error sound. On screen, Teracopy reports the source device no longer exists.
Upon reconnecting the iPod, the video folder is empty. I launch Recuva, update to the latest version 1.41.537, and tell it to search
folder for all files. It very quickly finds quite a few MP4 and IMG_xxx.DAT files. I sort by State, and the files I want appear to have an excellent recovery chance. Dates and sizes seem reasonable as well.
So, I select the files and attempt to recover them. Same thing happens as in the linked previous report: The "Recovering files" dialog appears. Current progress: 0%, 0 files recovered. No movement for over an hour, despite hovering in the 80-95% CPU usage range the whole time. Not one byte is recovered. Recuva doesn't respond to cancellation - I had to use PowerShell to kill the process.
The initial problem was reported in March 2010. Nineteen months ago.
I reported my problem in April 2011. Six months ago. At the time, the "Offical Piriform Bug Fixer" said
How about the next, next release? Any chance of recovering the files on an iPod Nano? Anything I can do to assist in debugging the problem?