I had 6 16GB sandisk SDHC class 2 cards with no problems. When i format them i had a record time of 80 min (record on 1440 1008) i have now 4 new 16GB sandisk SDHC class 4 cards en when i format this cards the recording time is 78 min!! also with this last cards i have playback problems "media restore" display on playback. also not possible to copy the corrupted files with clip browser?! other users with the same problem? bad cards?? thanks

I have 2 32GB Sandisk Class 2 cards which work great. Many have reported problems with the newer Class 4 cards.

Always test the cards by recording straight through end to end non stop. If at any point they give an error, return the cards. Sandisk has apparently changed their manufacturing with the cards. Try Transcend Class 6 cards. Always test the cards by recording end to end.

You should really test in HQ (XDCAM) not SP (HDV) mode.