It was formatted before it went into the new GoPro as the card was originally used in my 3. And I had to put the firmware file on it so I could update the new camera
It's a legitimate GoPro the serial number checks out and it wasn't bought of eBay from a guy named warren who's based in Asia. The video and stills were on the memory card 2 days ago as it had recorded some of the files to my phone also. The files were still on the memory card just before I removed the card from the GoPro. The strange files only appeared after plugging the card into a USB card reader and not the usual card adapter that I use. I've retrieved my files using a program called stellar photo and video recovery software. As for the weird files that I have no idea about and the reason I posted here was for information and possibly help if your here to just waste my time take it elsewhere