External hard drive can't reformat

Discussion in 'Storage' started by k9anathoth, Sep 12, 2012.

  1. k9anathoth

    k9anathoth New Member

    Sep 10, 2012
    Likes Received:
    hello i have a 2007 Macbook on which I`v used the hp media external HD for time machine but it stopped working so i got playing around with it in disk utility now time machine wont notice Ex HD ive tried to erase Ex HD but disk utility keeps telling me an error "could not unmount disk". can you help me???:(
    k9anathoth, Sep 12, 2012
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