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NinjaOne Backup — Error 303: NAS Path Not Configured on Device

Audience: T1 / T2 Use when: Backup pre-flight fails with "Error 303: NAS path not set up on the device."

What This Error Means

The backup plan is set to Hybrid (local + cloud), but no local NAS storage location has been configured at the organization, location, or device level in NinjaOne. Lockhart has nowhere to write the local leg of the backup.

This is almost always a configuration gap — not a hardware or connectivity issue.

Step 1 — Check the Org-Level Storage Location

  1. NinjaOne → Administration → Organizations → find the client org
  2. Click into the org → left sidebar → Backup → Storage Locations
  3. Verify a storage location exists with the correct UNC path: \\NAS-HOSTNAME\backups\ninjaone

If no storage location exists: create one (Step 2). If one exists but the path looks wrong: edit it.

Step 2 — Add a Storage Location (If Missing)

  1. Organization → Backup → Storage Locations → + Add
  2. Fill in:
    • Name: Use the NAS hostname (e.g., DENTAL-NAS01)
    • Path: \\NAS-HOSTNAME\backups\ninjaone — must match DTC standard exactly
    • Credentials: Use the dtcbackup service account (NOT the NAS admin account)
  3. Click Save

⚠ Before saving: verify the NAS share path exists and the dtcbackup account has read/write access. If the path doesn't exist yet, create the share on the NAS first.

Step 3 — Assign the Storage Location to the Backup Plan

After the storage location exists at org level, ensure the backup plan references it:

  1. NinjaOne → device → Backup → Edit the backup plan
  2. Under Local Storage: confirm the storage location is selected
  3. Save and trigger a manual backup run

Step 4 — Verify Connectivity From the Device

# Test from the device that's failing
Test-NetConnection -ComputerName "NAS-HOSTNAME" -Port 445

# Try to list the share
Get-ChildItem "\\NAS-HOSTNAME\backups\ninjaone" -ErrorAction Stop

If the share isn't accessible: fix connectivity before worrying about NinjaOne config.

Also Check: Error 318

Error 318 ("NAS_NOT_DEFINED") is similar to 303 but fires when no default NAS is set at any level. See: NinjaOne Backup — Error 318: Network Storage Not Defined

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