Traditional hard drives (sometimes known as HDDs) use spinning platters to store data in sequential 'blocks' across each platter. Here's how it works, and what you need to know. Defragmenting (or 'defragging') is one of the most commonly recommended tasks in this area, alongside uninstalling programs, checking your PC's memory, and running a virus scan.

If your computer's feeling slow, it might be time to do a little maintenance.

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For an optimal defragmentation, the file should have enough connected storage space available. What really matters is the size of the largest file that needs to be defragmented or moved around. To accelerate defragmentation, we recommend reserving at least 10-15% free hard disk space, however, this percentage decreases the higher the hard disk size is. Files larger than the maximum free and connected storage space, may not be possible to defragment, and if so only with several runs. For the best possible results, at least 5% of the whole hard disk capacity should be free. Free hard disk spaceĭrives without any free disk space cannot be defragmented. O&O Defrag has an optimized memory management which allows it to record all file and folder information. FoldersĪny number of folders can be defragmented. The storage capacity of a drive is therefore irrelevant.

O&O Defrag was optimized for use on file systems having an especially large number of files. Size of DriveĪll drive sizes supported by Windows are supported by O&O Defrag. These are caused by Windows and cannot be circumvented. The following limitations are valid for O&O Defrag. Conflicts with shadow copies during defragmentation.Schedule defragmentation at regular intervals.Differences between the various Editions.

Defrag free space