Checkpoints and models
Several checkpoints may be needed for comparison or recovery, even if one looks best today.
Where the space goes
Environments
Recreating an environment can depend on packages or credentials that are no longer available.
Private data inventories
Paths in reports can reveal customer names, research subjects, or internal project structure.
A practical cleanup workflow
Measure the actual source
Scan local datasets in the Mac app or use the CLI on a Linux machine. Use SSH when the data belongs to a remote host.
Save a report
Use nulldisk scan PATH --json for a record of the measured scope. Check for partial results before comparing totals.
Confirm reproducibility
Retain raw data, experiment metadata, locked dependencies, and any checkpoints needed to reproduce conclusions.
Review removals
Use explicit source-aware actions and a verified archive. Review report paths before sharing with collaborators or AI services.
Tools to compare
NullDisk offers native Mac maps, SSH/cloud sources, and development cleanup, plus a separate CLI. Match each tool’s platform and features to the job.
- GrandPerspective — People who want a free, inspectable treemap and reusable scan records. Requirements: macOS 14+ (current release)
- JDiskReport — Users who want cross-platform disk statistics and already use Java. Requirements: macOS, Windows, Linux (Java)
- Disk Graph — People who want saved storage history or a companion on iPhone/iPad. Requirements: macOS, iOS, iPadOS
NullDisk features → · CLI and terminal workflows →
Common questions
Are old model checkpoints disposable?
Only after you decide they are unnecessary and can be recovered or reproduced. Age and size are review signals, not sufficient evidence.
Can I automate reporting?
NullDisk’s CLI supports JSON/NDJSON output, schemas, scan budgets, and exit statuses for incomplete scans. Keep reporting separate from authorized cleanup.