Need Help Deleting Backup Files

[k4ever]

I installed the Xron-ified mod to my TouchPad and it is running fine with no issues. Prior to installing the mod I backed-up my Android install on the TouchPad. I had 1.3 GB of space left on the TouchPad prior to the backup and now I have 300MB left. How do I delete the backup, since I don't need it, and get the space back?