Hi, I just got an RH10 unit recently and experimenting with transferring my old MD collections to Hi-MD. I was using a 74min disc that contained recordings using my old MD MZ-R30. Formatted the disc using Sonicstage to Hi-MD, proceeded with recording with RH10. An error occured at the end, the "data saving" took much longer and the disc remained blank. Repeated this a few times and the same happened. I thought the disc was faulty (first encounter!). Took another disc with MD recordings, used the RH10 to reformat. Disc checked out fine. Started recording...bam! Error saving. The RH10 was locked in this loop, couldnt stop, couldnt disconnect from USB. Couldn't open case. In the end I yanked out the USB cable, pulled out the battery. Finally got the disc out. Reloading the same disc, it was empty. I decided to reformat the disc using Sonicstage to MD, put the disc into the old R30. Tried recording a CD via optical input. Disc was still empty at the end of the recording. Anyone experience this? Now I have 2 useless 74min, which I will probably take apart for fun.