Defraggler has many abilities, but it can't do everything. Here's a list of what it can and can't do.
Defraggler can
- Clean up your hard drive by defragging it
- Display all fragmented files, including those the Windows utility would skip.
- Defrag an entire drive, a folder, or one or more individual files
- Defragment the free space on your drive by gathering all the free areas into a single large free space
- Speed up your PC by placing pieces of files together
- Run from a USB drive
- Defragment drives sequentially (Ctrl+click the drives and press Defrag)
- Defragment RAID drives
Defraggler can't
- Defraggler can’t defragment files that are in use (so it may not always be able to reach 0% fragmentation)
- Defraggler can't defragment multiple drives at once
- Defraggler can't defragment NTFS drives with a cluster size greater than 64k
- Defraggler may not be able to defragment damaged drives
- Defraggler can’t work on network drives/NAS devices
