My uncle recently imported files from his SD card and there were serious errors. I have no idea WHY that's occurred, but the videos I took are once in a lifetime. I shot on .MOV format, but the card also contained some other Nikon camera format.
Images taken on both the Nikon and the Canon were imported. But he says that there was some problem with the videos. He mentioned "convert" and "mpeg4". I asked him what the net size after import was, and he said 20 MB. That's impossible even if conversion occurred because the videos are, in their basic format, at least a few gigabytes.
So did my Mac import, then delete those SPECIFIC files or did it format the whole thing?