Hi John.
Yes, i have been able to mount disks before, and after, with other cards. And yes, the disk mounted when i first tried, and i could copy almost all of it to the HD, then it gave me a message of error, and when i tried again i was not able to do it, and it began giving me that message that the disk was not readable by the computer. I did not see the clips, but i talked to the cameraman and he said he watched it after recording.