Frankly speaking, I never knew about disk wiping until today. I always thought that formatting disk is the last thing to do to clean the hard disk of data. Until when my external HDD crash recently, I have to search around for data recovery software. So I managed to learn that all the files that you deleted can still be retrieved easily with a freeware.
If you are interested in files recovery, I can recommend PC Inspector if you are still able to access the hard disk, if you can’t, I would recommend you retrieve the partition using EASUS Partition Recovery first. If you hard disk is big, then expect to take weeks to retrieved all the information, I took more than 2 weeks to retrieved 290gb of data.
For disk wiping, you can get the freeware here.