Log into your dedicated or cloud server as administrator.

1. Click Start, and then click Control Panel, Then click Administrative Tools, and then double-click Computer Management. Or, open the MMC containing the Storage, Click on Disk Defragmenter snap-in.
2. Click on Analyze to see if you have data to defrag.
3. Click on Defragment to start the service.

Red areas show fragmented files.
Blue areas show contiguous (unfragmented) files.
White areas show free space on the volume. White areas on an NTFS volume might also represent the MFT zone (the space set aside to keep as much of the MFT as possible contiguous).
Green areas show files that cannot be moved. The green areas usually represent the paging file, but on NTFS volumes, green areas might also represent space used by the NTFS change journal and the NTFS log file.