Conventional deletion of data from a device is not an effective solution for permanent deletion, because there are ways to recover deleted data with the help of special software. The solution to this are programs that use complex algorithms for decomposing data into a digital mash that can no longer be returned to its original form. Eraser is a free Windows application that can completely remove data from hard drives by overwriting it several times with carefully selected patterns.

As for optical disks (CDs, DVDs), the most elegant way to permanently destroy them is to use a special shredder that can destroy disks in addition to paper. Methods for physically destroying hard drives that can be found online, where the drive is acidified or burned, are extremely dangerous. Hard drives contain various types of harmful chemicals, which can cause toxic and flammable fumes.

If old equipment is ready for sale or a hard drive is destined for disposal, it will require deep cleaning, even if it is broken. The software that does this very efficiently is Darik’s Boot and Nuke. Good practice suggests that when disposing of old equipment - after special software has performed deep cleaning of the disks - the equipment is disassembled to destroy the ports and break the pins on the connectors.