SLVR L7 Recycle Bin?

Does anyone know where it is located on the phone? I tried to put new songs on there and before i did i had 55 songs. i deleted all of them and now i can only put 32 songs on there, and all of these songs have less mb, or kb. Most of them are kb and it says that my sync disk or my recycle bin is full and i need to go delete them. i never heard of the recycle bin until 2 days ago when the computer told me that, so it must be the bin, cause my disk isn't full. please help anyone. thank you in advance.

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Is it one of the reset buttons?