Acer MF-350 User Manual page 20

Note: Do not disconnect the MP3/Storage Drive from the computer
while the file transferring is still on going, otherwise it may cause some
system failure.
6. Under the MP3/Storage Drive, you are allowed to add, delete, or edit a
folder as what you will do under a disk as usual. In another word, this
MP3/Storage Drive works as another portable hard disk of yours.
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