Are those files:
1) Actually on the SD and not the camera's internal memory only?
2) Actual files rather than just thumbnails of corrupted data?
3) Files that are not corrupted?
I would bet you that one of those three won't pass.
If the files exist on the camera's memory, you'll have to transfer them to the SD first. If they are corrupted, tough luck. File corruption usually means a broken SD card, so you should replace it with a high quality Sandisk Ultra/Extreme or something from Lexar's 600x + line.