Hi there,
I’ve had this problem several times with my My Passport. It’s a different device, but the same solutions may apply.
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Let it stay plugged in for a long time, possibly overnight. Sometimes, when the device is improperly ejected, it just takes a while to reestablish its connection with the mac somehow. I have no idea how this works, but in every instance the HD has eventually re-mounted on its own if I left it plugged in long enough.
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Sometimes it appears that the device is not accessible, but in fact it just isn’t displaying in th left sidebar of finder windows for some unknown reason. In this case, if you go to disk utility and you do see it there, you may see at the bottom: "
Mount Point : /Volumes/MyPassport. If you click on the /Volumes/MyPassport link, it will take you to the files, and you can drag and drop the folder back into your favorites bar.
