Problems on MacBook Pro

[dnanian]

I don't know where your image was stored, but it certainly sounds like the transport for the image was failing (or an AntiVirus program was writing to your drive). I can't see how we could be writing to an image when we weren't running, though.

Then, restart your Mac. Make sure no other drive are attached, use the "Go To Folder" command in Finder to navigate to /Volumes. In there, check to see if there are any folders with the name of drives other than your startup volume. If so, delete them, then empty your trash.

Hopefully that'll take care of it.

As far as taking extra space, it's possible that something was writing very actively to a file on your drive. Please see the Troubleshooting section of the User's Guide for an explanation of how this can happen.

(Are you using FileVault?)