1. since yours is a wilson co ltd one like mine and not a sigmatel one, i suggest you to format it once using the mp3 disk tools as well.
2. no the unrepaired dump file will not help you to recover your player if it dies.
3. amv, mp3, jpg files can be stored anywhere, may it be the root folder or any folder created by you. there is no hard and fast rule that you have to store a particular file, only in a particular folder.
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