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On Windows, this information is harder to find than it should be, but the easiest way is to open the Defragment and Optimize Drives tool (type “defragment” into the search menu in the taskbar). Next, figure out which type of storage your computer has. For Macs, Apple recommends logging out of any iCloud services, including iTunes and iMessages. How you do this depends on which operating system you have and what type of storage drive your device has.īefore you wipe a computer, make sure that you have a backup of any files you need and deactivate any software that requires doing so. On most devices, wiping your data securely is pretty straightforward, and doing so can prevent your data from being recovered by someone you would rather not have it.

Remember to enter the correct drive or partition when executing this command.Your computer, phone, or tablet holds all kinds of personal information about you, and before you sell, return, recycle, or donate it, you should make sure to delete all of that information correctly.

The above command will write zeros to all the blocks, a block size of 4096, in the specified device or partition, sda in this case. If you want to reuse the drive, you can type: if=dev/zero of=dev/sda bs=4096 This powerful command can be used to convert, copy, and destroy data. If you’re familiar with Linux or Unix, then you might already know about the built-in dd command. This handy software is available for Windows and Linux, comes with a simple GUI, and can even be installed on a live USB with its portable version.