I have a digital voice recorder that I've used to record some voice notes. When I take the 4gb SD card out and put it in my Ubuntu machine, the folder is listed but there are no files in it. The device lists the files and can play them back.

df -h shows the device /dev/sdf1 mounted to /media/disk with 75mb in use with 3.6gb free. ls -l /media/disk shows 2 folders, both named 17-3460, both with the exact same create date and time. I only show 1 folder listed in file browser, but it is empty. I can't delete or rename the folder. I don't want to lose the files by formatting the disk. Is there a way to access the files?

Thanks,

Traigo

I was able to solve my own problem by using photorec and playing with different options. It recovered the disk.