Saturday, February 25, 2012

Disk Utility: How To Securely Erase The Free Space On Your HDD


Everyone has information on their Hard Disk Drive that they want to keep secure. We do almost everything on our computers these days from taxes to banking. Keeping your information secure is one of the most important things you can do. When your erase something from your HDD you are telling the computer that it can write over that item. The computer does not immediately delete that item. It is still on your Hard Drive until the computer writes over it, and that could take quite awhile. Disk Utility makes overwriting or erasing the free space on your Hard Drive very easy.


1. The first thing you want to do is open Disk Utility. You can find it in your Applications Folder in the Utilities Folder. You can also use Spotlight to open Disk Utility.

2. On the left hand side of Disk Utility you are going to want to select your HDD. By default it is labeled Macintosh HD, but a lot of people change the name of their Hard Disk Drives.

3. There are four tabs at the top of the Disk Utility window: First Aid, Erase, RAID, and Restore. We are going to want to select the Erase tab.



4. On the bottom left of the window is the Erase Free Space button. Click on this button. It will bring up a window that will let you chose how fast or how secure you want disk utility to erase your free space. Then Click Erase Free Space. The more times that the free space is written over the more secure it is, but this also takes more time. Erasing the free space on your Hard Drive is going to take a few hours. You can do this once a month to keep your HDD secure.