Unlike a standard Windows "Quick Format," which simply wipes the file system index, this tool performs a Zero-Fill. It clears the partition tables, MBR, and every single byte of data, replacing it with zeros. It is compatible with: SATA, IDE, SCSI, SAS, USB, and FireWire.

The software is technically proprietary and follows a "freemium" model. While you might see "license codes" mentioned in forums or shared online, here is the official breakdown: Free Version:

If you've ever had a corrupted USB stick, a hard drive with "un-deletable" partitions, or a disk you wanted to wipe completely before selling, you’ve likely come across the by HDDGURU .

Limited to a speed of 180 GB per hour (roughly 50 MB/s). It is intended for personal use and allows you to test the tool before purchasing.