potterfan, i can understand your problem.
why dont you try to seek a refund. if you are afraid that your dad will scold you then :
1. you can try converting mp3 to wma using the tool available in the download section. this will save about 50% of the space on your player and will make your player look as if it can store a lot in front of your dad.
2. you can also try converting amvs in low/medium quality.
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