Puran Wipe Disk is a free utility that can completely delete everything on your disk including the file system so that no data can be recovered or it can just wipe the free space so that already deleted files cannot be recovered.
Delete everything on a disk including file system.
Wipe all the free space of a disk.
Multiple disks can be erased in one click.
1 pass, 3 pass and 7 pass deletion is supported.
1 pass is quick and secure enough and recommended.
3 pass and 7 pass is slow and extremely secure.
By secure, it means the ability to recover the data.