![]() And we still have the red and yellow file there. Now, what happens if we delete the green file? Now we freed up those two blocks, so they're grey again. ![]() The first one's represented by the red blocks, and then there's a small one represented by green blocks, and then a larger one by the yellow. But let's say we write three files to the drive. Okay, so let's say these grey blocks represent blocks of data on your hard drive. Defragmenting it means it takes all the parts of a single file and places it on just one part of the hard drive. A large file may actually be written to different parts of the hard drive. You see, files on a hard drive don't exist just in one spot. And basically what it means is to take your hard drive and optimize it. So, if you're not familiar with the term, defrag is short for defragment. On today's episode, let's find out of you need to defrag your Mac hard drive. Video Transcript: Hi, this is Gary with MacMost Now. Check out MacMost Now 373: Do You Need to Defrag Your Mac? at YouTube for closed captioning and more options.
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