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

NetApp - NetApp offers storage and data management solutions that enable customers to accelerate business innovations and achieve cost efficiencies.

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.

CTERA - CTERA is the global leader in edge-to-cloud file services.

TreeSize - TreeSize tells you where precious disk space has gone to.

Komprise - Komprise give clients a cost-efficient, automated way to store, organize, and analyze data in both on-premise servers and the cloud.