Hi all, My 15" retina Macbook Pro froze recently so I held down the power button to shut it down. When I restarted the computer, the apple logo/sound played and a progress bar slowly filled up. However, when it finishes, the computer just shuts down. I ran disk utility at the startup and verified Macintosh HD. I got the error message "Error: Disk utility can't repair this disk disk, and restore your backed-up files". So I attached an empty, formatted, external 320 GB hard drive and tried to "create a new image" of Macintosh HD onto it. I know there's enough space because my entire hard drive is only 256 GB. However, as it creates the image, the progress bar moves about 1/8 of the way and then I get an error that there isn't enough space. Any help would be greatly appreciated as a year of media and schoolwork is saved onto it . Thanks in advance!