When using the Micca Speck media players to loop video or photo files for exhibition, your Mac computer will often create two "hidden" files that OS X does not show in the Finder, but the Micca Speck does. This can create issues with playing content correctly on the media player as it will try to play those hidden files back along with your content.
Here's a quick and easy video tutorial on how to delete them: https://www.youtube.com/watch?v=fVWJMdFeUbU