LumaDisk

LumaDisk is a disk space analyzer for macOS and Windows. It scans a disk or folder and draws it as a sunburst or treemap, with every folder sized by what it holds, so the largest ones stand out at once. Click a folder to drill into it, right-click to step back out, and switch between the two chart types with one click. The map draws itself while the scan is still running.

Beyond the map, it looks for space worth reclaiming. A duplicate finder groups identical files and marks the copy to keep, so one copy of every group always survives. An Unused list shows large files not opened in six months, a year or two years, with videos, installers and archives labelled. A developer cache finder recognises node_modules, Rust target folders, Xcode DerivedData, Gradle, CocoaPods, Python virtual environments and dozens more, limited to folders that rebuild themselves; Docker volumes, game installs and VM disks are excluded. Items can be queued from any list or dragged onto the Bin, then reclaimed with a ten-second undo. System folders are refused with an explanation rather than skipped silently.

On Windows it can read the NTFS Master File Table directly for a much faster scan. On macOS the Mac App Store edition is sandboxed and scans the folders it is granted; the direct download edition scans whole disks with Full Disk Access and can optionally connect Dropbox and OneDrive.

LumaDisk is a native app written in Rust, with eight interface languages and light and dark themes. It needs no account and has no analytics or telemetry. It is a one-time purchase with no subscription; the direct download (macOS) and Microsoft Store editions include a seven-day trial, and scanning stays free after it.