Key takeaways
- Pre-fitted heatsink is sized precisely for the PS5 slot, truly plug-and-play
- Officially licensed, so compatibility is guaranteed
- Comfortably exceeds the PS5’s speed requirement with no in-game slowdown
- Five-year warranty and dependable WD controller and NAND
What's inside
The WD_BLACK SN850P 1TB is Western Digital’s officially licensed storage expansion for the PS5, a Gen4 NVMe drive that ships with a pre-fitted heatsink sized exactly to Sony’s console slot. Rated up to 7,300 MB/s reads and 6,300 MB/s writes, it clears the PS5’s throughput requirement comfortably and installs in minutes without hunting for a compatible cooler.
It is made for PS5 and PS5 Pro owners who are tired of deleting games to make room and want a genuine, plug-and-play upgrade rather than gambling on a bare drive and aftermarket heatsink. PC users can use it too, but they are paying for a console-tuned heatsink they may not need.
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Watch: WD_BLACK SN850P Review — Video Review
Design & Build
The defining feature is the bundled heatsink: a slim aluminium block engineered to fit under the PS5’s expansion cover with no clearance issues, something not every third-party cooler manages. The drive itself is a single-sided M.2 2280 board using WD’s proven controller and BiCS TLC NAND. Fit and finish are clean, the heatsink is bolted rather than taped, and the whole unit feels purpose-built. Because the cooler is fixed, it is bulkier than a bare stick and less ideal for a laptop or a motherboard slot that already has its own heatsink.
Performance
Inside a PS5 the SN850P behaves exactly as it should: games install, load, and stream at speeds indistinguishable from the console’s internal SSD in normal play. Sony caps what the console exposes, so you will not see the full 7,300 MB/s in the PS5’s own benchmark, but you comfortably exceed the required floor and never feel a compromise switching a title to the expansion slot.
On PC the drive is a solid upper-mid Gen4 performer, quick in games and everyday tasks, though a step behind the very fastest Gen4 drives on sustained sequential writes. As with any high-cache TLC SSD, very large continuous writes eventually slow once the cache fills, but that scenario is rare on a console.
Pros & Cons
- Pre-fitted heatsink is sized precisely for the PS5 slot, truly plug-and-play
- Officially licensed, so compatibility is guaranteed
- Comfortably exceeds the PS5’s speed requirement with no in-game slowdown
- Five-year warranty and dependable WD controller and NAND
- Costs more than a comparable bare drive plus a cheap aftermarket heatsink
- Fixed heatsink makes it a poor fit for laptops or coolerless PC slots
- Sustained write speeds trail the fastest Gen4 drives
Alternatives to Consider
If you want more headroom, the Western Digital 2TB SN850 for PS5 doubles capacity with the same console-ready heatsink. Budget-focused buyers can look at the WD_Black SN7100 1TB, a bare drive that is cheaper and cooler-running but needs a separate heatsink for PS5 use. And anyone building a Gen5 PC rather than expanding a console should skip these and consider the WD_Black SN8100 2TB, which pushes reads near 14,900 MB/s.
Frequently Asked Questions
Do I need to buy a heatsink separately?
No. The SN850P ships with a heatsink already fitted and correctly sized for the PS5 expansion bay, which is the main reason to choose it over a bare drive.
Will it work in a PS5 Pro?
Yes. It meets Sony’s NVMe requirements and is officially licensed, so it is fully compatible with both PS5 and PS5 Pro consoles.
Can I use it in my PC instead?
You can, and it performs well, but the fixed console heatsink may clash with a motherboard’s own M.2 cooling, so a bare drive is often the smarter PC choice.
How much slower is it than the PS5’s internal SSD?
In practice you will not notice a difference during gameplay. Load and install times on the expansion drive match the internal storage closely enough that switching games between them feels seamless.
Verdict
The WD_BLACK SN850P 1TB is the low-hassle way to expand a PS5: licensed, correctly cooled out of the box, and quick enough that games feel native to it. You pay a small premium for that convenience, and PC builders have better-value options, but for console owners who just want it to work, this is one of the safest picks available in 2026.
