As drives have got bigger, computers have got faster, and operating systems have become more sophisticated, it has become something that runs in the background while you’re using your PC, but even this can require a helping hand from time to time, whether it’s an internal or external hard drive.įragmentation is something that happens to data on a hard drive that’s regularly used. It used to be a dreadfully slow process that you’d only attempt if something had gone dreadfully wrong with your hard drive, and even on the smallest drives you’d need to leave it overnight. Defragmenting, and therefore using the best defragmenter software, is a tricky one.