RCA H115A Mp3 Player (Same as RCA Lyra RD2765?) -... (by 2 users)

My computer recognizes the overall directory file of my RCA H115A Mp3 Player when it is plugged in. Yet when I attempt to open the music directory on the device it won't open and remains stuck as the little windows flashlight waves around back and forth. This happens on every computer I plug it into. It didnt have this problem to begin with, only after I had added a good bit of music to it. What's the problem?

Every time I plug my RCA H115a and try to open the contents on my computer it freezes the program I'm opening and it will not transfer the files!