Practical guide

NAS Running Out of Space: A Safe Checklist

Trace when usage grew and inspect retained versions before removing data you may need for recovery.

1. Find when growth began

Compare the storage graph and task history. Look for backup jobs, camera setting changes, or failed synchronization at the same time.

2. Check recycle bins and versions

Shared-folder bins, sync history, and backup retention can consume more space than file-browser totals suggest.

3. Review snapshots carefully

Snapshots retain changed or deleted blocks. Check retention and locked recovery points before removing them in bulk.

4. Verify CCTV rotation

Confirm camera count, bitrate, and retention settings. If automatic rotation stopped, inspect NVR logs and permissions.

5. Clean up in a reversible order

  1. Unneeded installers and duplicate downloads
  2. Verified recycle-bin contents
  3. Old versions after reviewing policy
  4. Snapshots only after confirming recovery needs
Do not delete internal filesystem folders directly over SSH. Use the vendor's storage tools.
Before you buy: Check the compatibility list and calculator published by your NAS, NVR, or drive manufacturer.

Real-world scenario

If usage jumps overnight, do not start by deleting large files. Correlate the start time with PC backup jobs, CCTV changes, snapshot schedules, and sync failures. Stop the cause, verify recovery points, then clean up.

Action checklist

  • Growth start time and job logs
  • Recycle bins and versions
  • Snapshot retention and locks
  • CCTV circular-delete status
  • Backup and recovery point before cleanup

Frequently asked questions

Can I delete every snapshot?

Avoid bulk deletion until you identify which recovery points may still be needed.

Should I delete hidden folders over SSH?

No. Prefer vendor management tools to avoid filesystem or package damage.

Last reviewed: 2026-08-21