WinContig is an easy-to-use file defragmentation program that allows defrag of parts of the drive. This is useful for squeezing extra performance out of important or frequently used files or programs without wasting time and energy cleaning up the rest of the drive.
Note that this is recommended only on magnetic disks. Flash-based drives (SSDs and thumb drives) don’t benefit from defragmentation and such maintenance tools can reduce the life of the drive.
The program engine is based on the standard Microsoft defragmentation API and allows you to group files into profiles, accepting a number of available command-line switches for additional control.