In 2 years, we've never had a problem with the P2 transfer to mac. Now, out of 3 cards, 2 are not transferring over in log and transfer. 2 of them were renamed by accident but have been named back to CONTENTS and have the right lastclip.txt file attached. Neither of them are able to transfer and have the invalid structure error. No other names have been changed. I understand I can transfer the files back to the cards on the hpx500 to repair them but can't figure out how to do that as when i try to do so I get the "cannot be modified" error. P2CMS can not read the files either. I have restructured the content folder as well - no dice. Any help would be appreciated. Thanks.