I think some flash player has such a problem. My first MP3 player was from Apacer and it's a 128mb. I had a similar problem but I managed to change it lah. Same problem appear not long after and I have to change it again. This happen 3 times until they gave me a new model before my warranty expires.

My advice is that stay away from all these clones. If you have to get one, get one from a shop that you can easily go back to and claim the warranty.