Perhaps this article from the SanDisk Knowledge Base, on this topic, could be of help?
http://kb.sandisk.com/app/answers/detail/a_id/848/kw/Please%20free%20200%20MB
Perhaps this article from the SanDisk Knowledge Base, on this topic, could be of help?
http://kb.sandisk.com/app/answers/detail/a_id/848/kw/Please%20free%20200%20MB