If ever you find yourself looking to recover files not backed up there is a free software called recuva.
Tried recuva right after it happened but most of the data was corrupted. I'm sure there was some sort of solution were I to have been further along (not that six months wasn't far enough. LOL). I had a few hand written notebook pages with song titles and some basic notes along the way so it was just a month of remembering how the parts went and re-recording with the help of a couple of friends who contributed, but it still sucked.