If you are looking for a reliable , these are the industry-leading options for different platforms: 1. DBAN (Darik's Boot and Nuke)

DBAN is the gold standard for bulk data destruction. It is a free, open-source tool designed to wipe entire hard drives. Completely blanking a computer before selling it.

You wouldn’t hand over your house keys to a stranger; don't hand over your bank statements, passwords, and private photos.

When you download a wiping tool, you will often see different "standards." Here are the most common:

Data wiping (also known as data clearing or data sanitization) is a software-based method of overwriting the data on a storage device so that it becomes unrecoverable. Unlike a standard format, which leaves data patterns intact, a wipe replaces your files with zeros, ones, or random characters across the entire drive. Why You Need a "Wipe Data" Tool

It includes several high-level sanitization standards, including the Gutmann method (35 passes). 3. CCleaner (Windows & Mac)

An intensive 35-pass overwrite. While highly secure, it is generally considered overkill for modern hard drives.