Is the Basic Capacity 3.5" HDD, 4 TB in stock right now?

No. At NotiFi's most recent check of the official US UniFi store, every Basic Capacity 3.5" HDD, 4 TB variant was sold out. This page updates within minutes when that changes, and NotiFi sends a push notification the moment it does.

How often does the Basic Capacity 3.5" HDD, 4 TB restock?

NotiFi observed 5 restocks in the last 90 days, with sold-out gaps averaging about 2 days. Past cadence is not a promise, but it is the best available signal.

How long does the Basic Capacity 3.5" HDD, 4 TB stay in stock?

The median in-stock window over the last 90 days was about 3 days. Short windows are exactly why an alert beats manual checking.

How do I get notified when the Basic Capacity 3.5" HDD, 4 TB is back in stock?

Watch it in NotiFi, the UniFi stock alert app for iPhone. NotiFi checks every product and variant on the official store continuously and pushes within minutes of stock flipping; Ultra plans can also forward alerts to Discord, Slack, or Home Assistant via webhooks.

UniFi stock tracker

Basic Capacity 3.5" HDD, 4 TB

Out of stock

from $159.00

3.5" SATA hard drive optimized for small-scale Protect camera security deployments and cloud gateway NVR storage.

Coming soonGoogle PlayView on store.ui.com ↗

Watch this product in NotiFi and get a push the moment it restocks.

Availability

last 90 days

Availability score

88/100 · Common

85%

availability

~2 days

restocks every

restocks

sell-outs

2 weeks

avg time in stock

3 days

median time in stock

6 weeks

longest in stock

30 minutes

shortest in stock

Stock history

times in ET

May 28Jul 12now

Sold out for 6 days
since Aug 20, 1:40 PM ET · ongoing
In stock 4 weeks
Jul 22, 10:10 AM → Aug 20, 1:40 PM ET
In stock 30 minutes
Jul 21, 2:10 PM → Jul 21, 2:40 PM ET
In stock 3 days
Jul 16, 7:10 PM → Jul 19, 9:30 PM ET
In stock 4 hours
Jul 16, 1:25 PM → Jul 16, 5:45 PM ET
In stock 6 weeks
Jun 2, 12:10 PM → Jul 16, 1:10 PM ET

Daily availability

last 8 weeks

July – August

in stock part of the day out of stock before tracking

Restock patterns

5 observed restocks

Restocks by weekday

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Restocks by time of day · ET

12a

10a

12p

Price history

changes since tracking began

$159.00
Jun 16, 2026

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Quick answers

Is the Basic Capacity 3.5" HDD, 4 TB in stock right now?: No. At NotiFi's most recent check of the official US UniFi store, every Basic Capacity 3.5" HDD, 4 TB variant was sold out. This page updates within minutes when that changes, and NotiFi sends a push notification the moment it does.
How often does the Basic Capacity 3.5" HDD, 4 TB restock?: NotiFi observed 5 restocks in the last 90 days, with sold-out gaps averaging about 2 days. Past cadence is not a promise, but it is the best available signal.
How long does the Basic Capacity 3.5" HDD, 4 TB stay in stock?: The median in-stock window over the last 90 days was about 3 days. Short windows are exactly why an alert beats manual checking.
How do I get notified when the Basic Capacity 3.5" HDD, 4 TB is back in stock?: Watch it in NotiFi, the UniFi stock alert app for iPhone. NotiFi checks every product and variant on the official store continuously and pushes within minutes of stock flipping; Ultra plans can also forward alerts to Discord, Slack, or Home Assistant via webhooks.

The Basic Capacity 3.5" HDD, 4 TB is sold out at the moment, which is the normal state for most of this catalog rather than an accident. Both of these explain what to do about that: How to buy sold-out UniFi gear and Why is UniFi always out of stock?

Embed the live stock badge

Hotlink this badge in a forum post, wiki, or blog and it stays current: it re-renders the moment Basic Capacity 3.5" HDD, 4 TB changes state.

Markdown  [![Basic Capacity 3.5" HDD, 4 TB stock](https://getnotifi.app/badge/uacc-hdd-s-4tb)](https://getnotifi.app/products/uacc-hdd-s-4tb)
HTML      <a href="https://getnotifi.app/products/uacc-hdd-s-4tb"><img src="https://getnotifi.app/badge/uacc-hdd-s-4tb" alt="Basic Capacity 3.5" HDD, 4 TB stock"></a>

The price-history chart embeds the same way and re-renders on every observed price change:

Basic Capacity 3.5" HDD, 4 TB price history chart

Markdown  [![Basic Capacity 3.5" HDD, 4 TB price history](https://getnotifi.app/products/uacc-hdd-s-4tb/price-chart)](https://getnotifi.app/products/uacc-hdd-s-4tb)

Never miss the next Basic Capacity 3.5" HDD, 4 TB restock.

NotiFi watches this product around the clock and pushes to your iPhone the moment stock flips. Free to download.

Coming soonGoogle Play

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