full-featured disk defragmenter
UltraDefrag Portable is a full featured disk defragmenter packaged as a portable app so you can fix-up hard drives on the go. Like most system utilities, this app requires admin rights.
Features
32-bit and 64-bit versions included and automatically selected
Easy to use interface
Filter files by name, size or fragmentation levels
Quick optimization of the drive, which mainly processes fragmented files
Full optimization of the drive, which processes all files despite of their fragmentation
https://portableapps.com