Disk SpeedUp v5.0.1.63

A Full Review of Disk SpeedUp, a Free Defrag Program

Disk SpeedUp is a free defrag program that supports lots of awesome features. Very specific settings can be edited and it supports scheduling defrags as well as boot defrags.

Disk SpeedUp is from Glarysoft, the creators of other system tools I recommend, like Glary Undelete, Registry Repair, Absolute Uninstaller, and Quick Search.

This review is of Disk SpeedUp version, which was released on April 22, 2019. Please let us know if there's a newer version we need to review.

More About Disk SpeedUp

Disk SpeedUp c drive analysis
  • Can be installed to Windows 10Windows 8, Windows 7, Windows Vista, Windows XP, and Windows Server 2003
  • Disk SpeedUp can defrag any file, folder, internal hard drive, or external hard drive, but not removable drives like flash drives
  • The results for a defrag is shown in the Report tab, which includes the file name, the number of fragments, the size, and the path of the files
  • Boot Time Defrag is a feature that will defrag your main hard drive before Windows even starts, which allows it to defrag the page file, hibernation file, MFT, and system files, which can't normally be defragmented because they're in use while Windows is running
  • Settings can be modified to defrag files only if certain conditions are met
  • A defrag and optimize (or just defrag) can be set on a daily, weekly, or monthly schedule for one or more hard drives
  • Auto defrag can be enabled to defrag one or more hard drives when the computer is idle (not being used); specific settings can be altered such as defining how long the idle period must last before starting the defrag as well as how much of the CPU can be used before pausing the defrag

Disk SpeedUp Pros & Cons

There are plenty of awesome features in Disk SpeedUp:


  • Small download size
  • Easy to use
  • Installs quickly
  • Can defrag single files/folders as well as whole hard drives
  • Optimizes a hard drive for quicker file access
  • Supports boot defrags
  • Can run a defrag and/or optimization on a schedule
  • Able to defrag multiple drives simultaneously
  • Very specific defrag and optimization settings
  • Specific files/folders can be excluded from a whole disk defrag
  • Can automatically turn off the PC when defragging is finished


  • Unable to defrag removable drives (like flash drives)
  • Tries to install another program during setup
  • Doesn't work from the right-click context menu in Windows Explorer

Disk SpeedUp's Advanced Options

There are two main features in Disk SpeedUp that should be looked at more closely.

Defrag Conditions

In the Tools > Options > Defrag menu are four options for defining when a defrag should take place. These options should be defined to avoid spending time defragging tiny files or files that have huge fragments.

Only defrag files that:

  • Have fragments smaller than [X] MB: The number chosen here defines how large a fragment can be before a file should be defragged. The purpose is to avoid defragging huge files that have hundreds of megabytes of fragments. For example, if you lower the number to 10 MB, Disk SpeedUp will defrag files only if they contain less than 10 MB of fragments.
  • Have more than [X] fragments: This explains the number of fragments that are allowed to exist in a file before Disk SpeedUp will defrag it. If you choose 10 fragments, a file will be required to have more than 10 fragments before it will be defragged. As you choose a higher number, Disk SpeedUp is bound to defragment a smaller number of files.
  • Are larger than [X] MB: This setting is used to avoid defragging really small files. Disk SpeedUp will only defrag files that are larger than the number you have here.
  • Are smaller than [X] MB: As you'd expect, this option is the opposite of the previous one. Any number chosen here creates a maximum file limit to what can be defragged. For example, choosing 10 MB for the previous setting and 20 MB for this one means Disk SpeedUp will defrag files that are between those two sizes only. This drastically cuts down the number of files that will be defragmented.

Though they're all enabled by default, deselecting any of the above options will cause Disk SpeedUp to skip over that setting and apply no limit to it. For example, deselecting the final two options will allow Disk SpeedUp to defrag a file of any size.

Optimize Files

Some defrag programs let you optimize files. This means the program can move specific files, files of a certain size, or particular file formats to a part of the hard drive that moves slower than the rest. If particular files are moved out of the faster portion of the drive and into the slower areas, it will in effect shift things around to place specific files into the faster areas, which in turn produces better performance.

When I say "the program can move" files I don't mean move them out of your custom folders to the point that you will lose track of them. This just means that the physical location of the file on the disk will change, but not the location as you see it in the regular structure of folders. In other words, you won't actually see this take effect.

Disk SpeedUp's optimization settings allow you to define file sizes and file formats that should be moved to slower areas of the disk. To optimize a disk, first select the hard drives you want to optimize and then choose Defrag and Optimize from the File menu.

The Tools > Options > Optimize menu option holds the optimization settings that you can change. Under Move large files to the end of the drive are four options:

  • Minimum file size: This option can be modified to one of ten file sizes from 10-100 MB. Choosing 100 MB, for example, means files that are larger than 100 MB will be moved to the end of the disk.
  • Files that were not accessed in last month: This one is pretty straightforward - any file that wasn't accessed last month will be moved to the slower portion of the hard drive.
  • Files in the Recycle Bin: All files that are currently in the Recycle Bin will be moved.
  • Files in the selected types: Below this are options called Archives, Movies, and Disk Images along with some of their corresponding file types. Choosing any of the three categories of file formats will move files with those extensions to the end of the disk, such as RAR, MP4, and ISO files. This is completely editable, which means you can put in any file extension that you'd like moved.

Any of these options can be combined together or completely disabled. This means you could setup Disk SpeedUp to move files that are more than 50 MB in size, not accessed last month, and are ZIP files to the very end of the hard drive, but not touch the Recycle Bin files. Alternatively, you could disable this entire move feature if you'd rather not use it.

My Thoughts on Disk SpeedUp

I think Disk SpeedUp is an awesome program. The very specific defrag settings and the ability to optimize a disk should definitely be included in all defrag programs.

Some defrag programs, like Defraggler, include may of the features Disk SpeedUp lacks. This includes removable drive support, a portable version, context menu integration, and moving specific fragmented files to the slow portion of the hard drive (not just those of a certain file extension).

That being said, I still think Disk SpeedUp is a great program and may even be easier to use for some people.

After Disk SpeedUp has been installed, setup will automatically install another program from Glarysoft unless you uncheck for it to do so.