Disk Inventory X, developed by Tjark Derlien, is a disk space analyzer for Mac that helps users locate oversized files and storage-heavy folders. It scans mounted volumes or selected directories and converts the results into a color-coded treemap, where larger rectangles represent larger files. File-kind statistics, folder navigation, physical and logical size reporting, and Finder actions support detailed inspection. The tool suits users who prefer manual storage analysis over automatic cleanup recommendations.

When file sizes become a mosaic

The treemap visualization converts the scanned folder hierarchy into a collection of colored rectangles arranged by size. A matching legend groups files by kind, while the directory view connects each block to its location on the drive. Users can zoom into folders, compare physical and logical storage use, and inspect individual items. This combination of visual mapping and file-kind statistics makes large files inside deeply nested directories easier to identify.

Scanning on demand instead of standing guard

Disk Inventory X performs scans when the user selects a mounted volume or folder rather than monitoring storage continuously in the background. Narrowing the scan to one directory reduces the number of files that need inspection, although large locations containing many small items can still take time to process. The original application also requires Rosetta on Apple Silicon hardware, reflecting an aging build rather than a modern native release.

Cleanup tools with the safety lock removed

Selected items can be revealed in Finder or moved directly to the Trash, providing a convenient path from identifying a large file to removing it. Full Disk Access is only needed when users want to inspect protected locations. However, Disk Inventory X cannot determine whether an unfamiliar file is safe to delete. Manual cleanup therefore requires careful judgment, especially around application data, system resources, and active project folders.

Simple controls wrapped in older packaging

The basic workflow remains straightforward: scan a location, select a rectangle, inspect the corresponding file, and decide whether to keep or remove it. However, the dated interface lacks the guided recommendations and polished permission prompts found in newer storage utilities. The aging build also requires Rosetta on newer hardware and can trigger Gatekeeper warnings during installation, creating extra setup friction for users unfamiliar with system security controls.

Useful clarity without automatic cleanup

Disk Inventory X remains a practical option for users who want a direct visual explanation of where their storage has gone. Its treemap, file statistics, and Finder integration provide enough detail for targeted manual cleanup without adding background monitoring or automated deletion. However, its aging compatibility, dated presentation, and lack of safety recommendations place responsibility firmly on the user. It works best for people comfortable inspecting files before removing anything from their computer.