One of the better ways to protect data on an old SSD is to encrypt the drive. Without the passcode or encryption key, Backblaze notes, any data on the drive will be useless to those that may come across it. As an added step, the online storage provider suggests reformatting the drive, encrypting it and reformatting it again. If you want to be absolutely certain that nobody can retrieve data from your old SSD, take the above steps to encrypt it and then shredding it into tiny pieces. This method isn't cheap, however, as you'll need special equipment to do so although I suspect some quality time with a selection of power tools could pull off similar results. Or, you could always burn it.