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NinjaOne Backup — Error 344: NAS Storage Low Space (Warning)

Audience: T1 / T2 Use when: Backup fails with "Error 344: Network Storage Low Space" (warning) — distinct from Error 345 (critical).

Error 344 vs. Error 345

Code Threshold Backup Impact
344 NAS storage is low — approaching full Warning only — backup may still complete this run
345 NAS storage is critically low Hard failure — backup cannot write new data

Error 344 is a heads-up. Act on it before it becomes 345.

Step 1 — Check How Much Space Is Left

Log into the NAS admin panel:

  • Synology: Storage Manager → Volume — check free space on the backup volume
  • QNAP: Storage & Snapshots → check pool/volume free space

Also check from the protected device:

# Approximate size of the NinjaOne backup folder
Get-ChildItem "\\NAS-HOSTNAME\backups\ninjaone" -Recurse -ErrorAction SilentlyContinue |
Measure-Object -Property Length -Sum |
Select @{N='TotalGB';E={[math]::Round($_.Sum/1GB,1)}}

Step 2 — Empty the NAS Recycle Bin

If the NAS backup share has the recycle bin enabled, trimmed backup revisions accumulate there instead of being deleted. This is the most common reason 344 appears despite the retention policy running:

Synology: Control Panel → Recycle Bin → Empty Recycle Bin (filter by the backup share) QNAP: File Manager → Recycle Bin → Empty

After emptying: recheck free space.

Step 3 — Verify Retention Is Running Correctly

Retention trimming should automatically remove old revisions to make room for new ones. Confirm the DTC standard is applied:

  1. NinjaOne → Organization → Backup → Storage Locations → check the retention policy
  2. Standard: 1 month, daily for 14 days
  3. If retention is set to "unlimited" or a very long period: adjust to DTC standard and save

Step 4 — Remove Orphaned Device Folders

If devices have been decommissioned or removed from NinjaOne, their backup folders on the NAS may remain:

  1. Log into NAS File Manager → backups/ninjaone
  2. Compare folder names (they correspond to device names) against active devices in NinjaOne
  3. Folders for devices no longer in NinjaOne can be deleted safely

Step 5 — Disable Recycle Bin on the Backup Share (Permanent Fix)

Prevent future accumulation:

  • Synology: Control Panel → Shared Folder → select backups → Edit → uncheck Enable Recycle Bin
  • QNAP: Shared Folders → select backups → Edit → disable recycle bin

This ensures trimmed revisions are permanently deleted immediately, not moved to the recycle bin.

If Space Cannot Be Recovered

If after cleanup there's genuinely not enough NAS capacity for the backup footprint: flag to the AM. The NAS may need capacity expansion, or the scope of what's being backed up needs review.

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