Diskflag / Guides Disk space guides By Scott Foster, founder of DiskflagUpdated October 24, 2026 How to free up space on your C drive in Windows 1111 safe steps, from the Recycle Bin to Docker disks. What's safe to delete on Windows 11Folder by folder: what you can clear and what to leave alone. Best disk space analyzers for WindowsWizTree, WinDirStat, TreeSize, SpaceSniffer and Diskflag compared. WinDirStat alternativesFaster or more helpful options, and when to stay with WinDirStat. WizTree vs WinDirStatSpeed, features, price and which to pick.