I have been transferring some of my m4a music files to my SanDisk Clip Sport and have noticed that when playing back, the device skips over some of the files. The m4a files that I have generated for use on the clip sport are all made using the same methods. Some play and some dont. The files that dont play seem to be files around 3900Kb or larger. So basically anything around 4Kb in size or larger wont play. This is the only thing I find in common about the files that wont play. Again, anything under 3900Kb in size plays fine. Is there anyway I can get the device to play the larger files? Is there something that I overlooking?