I have purchased a media player and a toshiba external hard drive 500GB to watch films on, I decrypted some DVDs and put them on the hard drive, this worked fine when playing them through the media player, as I have gradually added more films to the hard drive the media player won't recognise the hard drive any more...I'm nowhere near the capacity of the hard drive yet. I deleted all the films off of the hard drive then just put one on it incase it was a capacity issue but it still isn't playing them. The media player recognises that there is a USB connected but won't let me select the movie icon....what can I do??