Hi, I just joined the forum because I had the very same problem tonight with a Tascam DR5: recorded a 2&1/2 hr concert, recording led was on, everything seemed right. When I pressed stop, got the message “Can’t save file” or something like that, waited a bit, then shut off the DR and got another error message. The file is supposedly there, but with zero bytes, no way to recover it. I am soooo angry. Actually this has happened me another time, but in that case the tascam fell during recording and shut off. This time all looked ok, batteries were just recharged. I’m trying some recovery software like Recuva, but to no avail.