Shinco PMP-1700 HDD Player

Question

I was experiencing a lot of problems with avi files skipping when i was watching them on my HDD Player I copied all the files from the player onto my computer the formatted the hard drive and ran a scan disk to ensure everything was running ok. When I copied the files back onto the HDD it opens up the main screen where you can select either pic, video etc. However when you go into these options it says there is no files available. I have tried to place the video files in other locations but still had no joy. Any help would be very much appreciated.