WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.

Stellar Volume Optimizer - Stellar Volume Repair (also Optimizer) repair corrupt Macintosh HD and other partitions formatted...

WizTree - WizTree quickly finds the files and folders using the most space on your hard drive. It scans the MFT (Master File Table) instead of crawling the entire disk which makes it very fast.

chkdsk - A command line tool to check for errors on and repair ntfs filesystems.

SpaceSniffer - SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.

Macrorit Disk Scanner - Macrorit Disk Scanner is a third party disk surface portable tool for scan disk bad sectors which...