Fastest – The quickest option, this does a single pass write of a bunch of zeros over the unused portion of the hard drive.The three Erase Free Space options are as follows:.Select the desired level of erasure and choose "Erase Free Space" to begin the process of overwriting the free space on the hard drive.Choose the "Erase" tab, then choose the "Erase Free Space" option.Connect the hard drive if it's an external disk, and then select the hard drive from the left side menu.Launch Disk Utility, found within /Applications/Utilities/ or through Launchpad.Erasing Free Space on Hard Drives in Mac OS X This option is not available for flash-memory based SSD models (like those bundled within the MacBook Air, Retina MacBook Pro) because those drives use the TRIM function to quickly remove and recover blocks instead, which has the side effect of automatically preventing file recovery fairly quickly – often within 10 minutes of emptying the Trash. This only works on traditional hard drives of the spinning platter variety, which is typical for MacBook Pro, Mac Mini, and iMac models, and is the case with most external hard drives used for backups. Lastly, it's often helpful to go through your browser and clear any temporary files, and make sure you empty your recycling bin - those files will show up as lots of tiny squares in tools such as WinDirStat, but can add up to significant amounts of data over the years.The Mac OS X Disk Utility app provides an ability to erase free space on traditional hard drives, which overwrites vacant disk space on the drive to prevent any potential recovery of deleted files (that is, files that have been removed traditionally, rather than through secure methods).
In Windows, you can also right-click on your drive in 'This PC', select properties, and then go to the 'Disk Cleanup' menu, where the OS will show you a few files that can usually be safely be cleared up. Deleting system files can result in a computer that won't work anymore, requiring a Windows repair, or worse, re-installation.
There are naturally important system files that shouldn't be deleted, so make sure you only delete games or software you know is safe to uninstall or delete files you can afford to miss or have multiple copies of elsewhere. Don't Delete Everythingĭo be careful what you choose to delete, though. Nevertheless, after WinDirStat told me that Hitman was hogging a lot of space, I opened Steam and uninstalled the game, freeing up a much-appreciated 65.7 GB of SSD space.
While this might work on a data drive where you find movies or other large data collections, programs need to be uninstalled. Of course, what you shouldn't do is simply go ahead and delete the game files.
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