WD_BLACK SN850X 4TB for PS5: live price and fit
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As of 21 October 2026 the cheapest new WD_BLACK SN850X 4TB is £599.00. That is £149.75/TB, also the best value per TB at this size. At this size it reads at up to 7,300 MB/s with 2,400 TBW of endurance. 4TB suits a household console or a collector: roughly 53 big games at 75GB each. Most single players will not fill it.
PS5 requirements as published in Sony's M.2 SSD support page. Prices from Amazon.co.uk.
4TB WD_BLACK SN850X at a glance
| Spec | Value |
|---|---|
| Capacity | 4TB (about 53 games at 75GB each) |
| Sequential read at this size | 7,300 MB/s |
| Endurance at this size | 2,400 TBW |
| PS5 compatible | Yes |
| Heatsink | Heatsink version fits |
Figures are the maker's published "up to" ratings, checked October 2026 against the maker's sheet 1 and the maker's sheet 2.
Who the 4TB model suits
4TB suits a household console or a collector: roughly 53 big games at 75GB each. Most single players will not fill it.
All 4TB PS5 SSDs shows where this drive ranks on price today, and the WD_BLACK SN850X page covers the model as a whole.
WD_BLACK SN850X 4TB against its other sizes
| Size | Cheapest new price | Price per TB |
|---|---|---|
| WD_BLACK SN850X 4TB (this page) | £599.00 | £149.75/TB |
| WD_BLACK SN850X 1TB | £178.99 | £178.99/TB |
| WD_BLACK SN850X 2TB | £399.63 | £199.82/TB |
| WD_BLACK SN850X 8TB | £1,190.00 | £148.75/TB |
Cheapest compatible new listing per size on Amazon.co.uk, as of 21 October 2026.
Rivals at 4TB: live prices
| Drive | Read speed | Price | Price per TB |
|---|---|---|---|
| Kingston FURY Renegade | 7,300 MB/s | £522.23 | £130.56/TB |
| Kioxia Exceria Pro | 14,900 MB/s | £659.99 | £165.00/TB |
| SanDisk Optimus GX PRO 850P | 7,300 MB/s | £1,020.99 | £255.25/TB |
The tracked models nearest the WD_BLACK SN850X in class and rated speed, each at its cheapest compatible new 4TB listing on Amazon.co.uk, as of 21 October 2026.
Fitting the 4TB drive
Yes. Bought with its heatsink, the WD_BLACK SN850X goes into any PS5 model with the cover closing normally. For reference, Sony's M.2 SSD requirements allow a module up to 11.25mm thick and 25mm wide.
Higher capacities are often double-sided boards. That does not change the PS5 limit, which already allows up to 2.45mm below the board, but it does matter for clip-on heatsinks with a thin base plate.
Compatible drives, live prices
| Product | Capacity | Price | Price per TB | Tech | Prime | Buy |
|---|---|---|---|---|---|---|
| WD_BLACK SN850X NVMe SSD 4TB (Up to 7,300 MB/s read speed, Up to 6,600 MB/s write speed, M.2 2280, PCIe Gen4, Gaming Storage Expansion, High Performance Internal solid state drive) POWERED BY SANDISK | 4 TB | £599.00 | £149.75 | NVMe | - | Buy on Amazon |
| WD_Black SN850X 4TB NVMe PCIe 4.0 x4 M.2 Internal Gaming SSD with Heatsink | 4 TB | £599.99 | £150.00 | NVMeHeatsinkFits PS5 | - | Buy on Amazon |
| WD_BLACK SN850X WDS400T2XHE - SSD - encrypted - 4 TB - internal - M.2 2280 - PCIe 4.0 x4 (NVMe) - TCG Opal Encryption 2. | 4 TB | £650.00 | £162.50 | NVMeHeatsinkFits PS5 | - | Buy on Amazon |
Related comparisons and guides
More to read: All models, 2TB, With heatsink, Cheapest PS5 SSD, PS5 SSD requirements, The 11.25mm height rule.
Frequently asked questions
What is today's price for a 4TB WD_BLACK SN850X?
£599.00 is the lowest new price we found on 21 October 2026. That is £149.75/TB, also the best value per TB at this size.
How many PS5 games fit on a 4TB WD_BLACK SN850X?
About 53 at an average of 75GB per big game. A single very large game can take 150GB or more, so the real number depends on what you play.
How many terabytes written is the 4TB WD_BLACK SN850X rated for?
Its rating at this size is 2,400 TBW. A console writes mainly when installing and updating games, which is a small fraction of that.
How fast is the WD_BLACK SN850X at 4TB?
7,300 MB/s, which clears the recommended 5,500 MB/s.
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Last updated: 2026-10-20 06:04:41 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.co.uk and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.