I need help, what i have to do with this

[odmpats]

hi, i bought one mp4 full metal silver player from ebay it worked but then when i try to plug it in my computer i cannot see it as a device the device manager called it AFDU device. I can't open it to indentify the chip because it's full metal i try to open and i can't.It looks like ebay capacity 8 gb it says. please help me. When i try to open it the only thing i can see its a blue screen with an hourglass. Any information would be helpful. Thank in advance