Please help. I wanted to install Ubuntu so I follow this guide: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx I used my external hard drive to do this but then after I finished everything, when I plugged in my external hard drive I get "The disk you inserted was not readable by this computer" and I cannot see my external hard drive in Finder, but I could see it in the Disk Utility. Does this mean all my data was erased? How do I get my external hard drive back? I don't want to delete everything on my external drive because I have about 300gb of data on it. Thank you.
First of all test your external HDD on your installed Ubuntu system. There is a chance that Ubuntu can still read it. If so, backup all your data from it (to have a copy at least), and go back to Mac and using the Disk Utility:
You will have 2 options:
- If you succeded with making a copy: format your external HDD, and copy back all your data from the location where you made the backup.
- If it failed: ask a professional to help you. Don't try to use "magic" softwares to recover your data, because it is a huge chance that you will destroy for good your data.