So I was in the process of creating a ubuntu live USB with the start up disc creator on my Ubuntu 14.04 computer. I meant to format the USB stick that was in my computer but accidentally selected my 256GB External Hard Drive that used to contain every single thing I have ever done on a computer since middle school. 12 years of data gone.
I immediately ejected the drive and have not touched it since. I know that when you delete a file that generally it does not actually get deleted but is made available to be over ridden.
Is it possible for me to unformat my drive?