Acronis Cyber Protect Home Office - (Formerly Acronis True Image) Complete protection for your digital life
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
Clonezilla - Clonezilla is a suite of software that's designed to allow you to back-up and image new hard drives with your data.
TreeSize - TreeSize tells you where precious disk space has gone to.
Easeus Disk Copy - EaseUS is a suite of data recovery and protection software designed to bring back files that have been lost, destroyed or accidentally deleted and protect existing files from suffering the same fate.
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.