Importing media: currupted files
I've imported the media I shot on a Sony FS700 directly from the SD Card into a library in FCP. As soon as it was done importing, I checked all the clips for any issues just like I'm used to do every time I import new media, and it was all normal.
Some days after I was going to begin editing and I notice that about 85% of the clips were corrupted. It playbacks only the first 2 seconds of the clip, then it freezes. When I open the original media in Finder, it happens the same thing.
As I checked the media after importing, I'm assuming the issue is in the softwere, and I can't seem to recover the files. I can't recover the files from the card either because I've formated and reused it.
I'm not able to the deliver the film to the client. Can anyone help me?
iMac, OS X Yosemite (10.10.5)