How to Fix UniFi Protect Storage Almost Full Warnings
- Recording workload near disk capacity
- High bitrate/resolution
- Continuous recording
Problem Description
UniFi Protect shows storage warnings — the NVR drive is near capacity and old recordings are being deleted sooner than the configured retention. Total storage consumption depends on the number of cameras, bitrate, recording mode, and retention settings. Reducing any of these lowers consumption; adding more physical storage increases capacity.
Why This Happens in Real Homes
A UniFi Protect storage-almost-full warning simply means your recording workload has nearly filled the drive — the NVR overwrites the oldest footage when full, so it's not an emergency, but the warning is a prompt to rebalance if you want more history than the disk currently holds. Adding cameras or raising quality without adding storage is the usual trigger.
Create headroom by shortening retention, lowering bitrate or resolution on some cameras, or switching cameras that don't need 24/7 to detection-only recording. If you want to keep the current quality and history, add or upgrade the drive. The warning is normal as a system approaches capacity; the choice is between more storage or trimming the workload to fit.
Symptoms
- Storage almost full warnings
- Nearly full alert
- Low storage warning
- Disk nearing capacity
- Storage warning recurring
- Running out of space
- Almost-full notification
- Space warning
Recognize these? Here's what usually causes it.
Common Causes
- Recording workload near disk capacity
- High bitrate/resolution
- Continuous recording
- Added cameras without adding storage
- Retention set long
- Detection/footage accumulation
- Disk smaller than needed
- Overwrite threshold reached
Most fixes happen in the first 3 steps.
Do not wait until critical-full state before retention tuning.
Tools & Requirements
Step-by-Step Solution
Check current storage usage and largest consumers
In Protect: go to Settings > Storage (or System in some versions). The storage overview shows total capacity, used space, and per-camera breakdown. Identify which cameras consume the most storage — cameras with high bitrate, high FPS, or long retention settings use disproportionate space. A single 4K camera at 15 Mbps uses about 160 GB per day. Reducing the top consumers' settings has the biggest impact on freeing space.
Reduce retention for less critical cameras
Not every camera needs 14 or 30 days of retention. In Protect: Settings > Recording > Retention. Set high-priority cameras (front door, main entrance) to 14-30 days. Set low-priority cameras (garage interior, laundry room) to 3-5 days. This frees significant storage without losing coverage on critical cameras. After reducing retention: Protect automatically deletes recordings older than the new retention limit (may take a few hours to process).
Switch cameras to motion-only recording
Continuous recording captures everything — including hours of empty driveways and quiet rooms. Switch low-activity cameras to 'Detections Only': Protect > Devices > camera > Recording Mode > Detections Only. This records only when motion is detected, reducing storage by 60-90% per camera. Keep continuous recording on cameras where you need gapless coverage (entrances, high-security areas). The storage savings are immediate for new recordings.
Lower bitrate and resolution on storage-heavy cameras
Halving the bitrate halves storage consumption. In Protect: Devices > camera > Recording Quality. 1080p at 4 Mbps is still good security footage quality. 4K at 8 Mbps is a good balance if you need 4K. Avoid bitrates above 12 Mbps unless you have ample storage. Each camera's daily storage use (in GB) = bitrate (Mbps) × 10.8. Use this formula to calculate whether your total daily consumption fits within your available storage divided by your retention period.
Add more physical storage
If retention and quality are already optimized: you need more disk space. UDMP: replace the internal 2.5' drive with a larger one (up to 5TB). UNVR: add more drives to the bay (supports up to 4 × 8TB = 32TB raw in RAID). CK-G2+: the internal 1TB drive is not user-replaceable but you can use an external USB drive (limited support). For very large systems (20+ cameras): use the UNVR Pro with 7 drive bays. Storage planning: calculate total daily consumption across all cameras, multiply by desired retention days, add 20% headroom.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If this comes back after following these steps, check whether a recent app or firmware update reset a default setting — the fix works, but the setting gets reverted silently.
Use storage forecasting based on real camera bitrate and motion volume.
This issue almost always looks more complex than it is — the majority of cases trace back to a single setting, a stale credential, or a default that shipped wrong.
- Recording workload near disk capacity
- High bitrate/resolution
- Continuous recording
- Added cameras without adding storage
- Retention set long
Before you go — try one of these (they fix most cases).
Official Manufacturer Manual
UniFi Protect provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your UniFi Storage Capacity.
Source: help.ui.com
Need More Help? UniFi Protect Support
Note: The contact information below connects you directly to UniFi Protect's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
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