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Short on time? Our top pick is Crucial P310 1TB, TEAMGROUP MP44S 2TB takes Best 2TB for Steam Deck, while WD_BLACK SN770M 1TB takes Best Gaming Brand Pick.
- Best SSD for Steam Deck Overall Crucial P310 1TB Check price
- Best 2TB for Steam Deck TEAMGROUP MP44S 2TB Check price
- Best Gaming Brand Pick WD_BLACK SN770M 1TB Check price
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The best SSD for Steam Deck gives you room for more games without relying on a microSD card. Valve's current Steam Deck tech specs list 512GB and 1TB NVMe models, and big games fill that space fast. Swapping in a larger internal SSD keeps every game on fast NVMe storage.
iFixit's Steam Deck SSD replacement guide describes the original drive as a single-sided M.2 2230, so every pick in this guide is an M.2 2230 NVMe drive whose Amazon listing names the Steam Deck as compatible. We checked each listing in October 2026 and compared the specs the makers publish. We do not list prices because Amazon prices change in real time; use the buttons to see the current price and availability. Scores are our editorial scores out of 10, not Amazon customer ratings.
Best Steam Deck SSDs at a Glance
| Award | Drive | Capacity / Max Read | Best For | Score |
|---|---|---|---|---|
| Best SSD for Steam Deck Overall | Crucial P310 1TB (2230) | 1TB / 7,100MB/s | Most Steam Deck owners | 9.1/10 |
| Best 2TB for Steam Deck | TEAMGROUP MP44S 2TB | 2TB / 5,000MB/s | The biggest library | 8.9/10 |
| Best Gaming Brand Pick | WD_BLACK SN770M 1TB | 1TB / 5,150MB/s | WD_BLACK fans | 8.8/10 |
| Best HMB Pick | Acer MA200 1TB (2230) | 1TB / 5,200MB/s | Cool, steady play | 8.6/10 |
| Best Slim 2TB Option | Addlink S91 2TB (2230) | 2TB / 5,000MB/s | Tight fit and HMB | 8.4/10 |
| Best Budget Steam Deck SSD | fanxiang S630 1TB (2230) | 1TB / 5,000MB/s | Saving money | 8.2/10 |
Crucial P310 1TB M.2 2230 SSD, PCIe Gen4 NVMe
Crucial lists the P310 for Steam Deck, ROG Ally and Surface, with reads up to 7,100MB/s, a low power draw and a 5-year warranty.
TEAMGROUP MP44S 2TB M.2 2230 PCIe 4.0 NVMe SSD
TEAMGROUP calls the MP44S a top choice for Steam Deck capacity upgrades, with 2TB, a graphene label and reads up to 5,000MB/s.
WD_BLACK SN770M 1TB M.2 2230 NVMe SSD, PCIe Gen 4.0
WD's first M.2 2230 WD_BLACK drive, listed for Steam Deck and ROG Ally, with nCache 4.0 and a 5-year limited warranty.
Acer MA200 1TB M.2 2230 NVMe SSD, PCIe Gen 4
Acer lists HMB plus SLC cache and a graphene heat spreader, with reads up to 5,200MB/s and Steam Deck support.
Addlink S91 2TB M.2 2230 NVMe SSD, PCIe Gen4x4
A 2TB 2230 drive with HMB and SLC caching, and a listed maximum height of 2.15mm, for select Steam Deck models.
fanxiang S630 1TB M.2 2230 NVMe SSD, PCIe Gen 4x4
A 1TB S630 with a graphene heat sticker, reads up to 5,000MB/s and 5-year or 320TBW service, listed to fit Steam Deck.
In-Depth Reviews
1. What Size SSD Does the Steam Deck Use?
The Steam Deck uses an M.2 2230 NVMe SSD. The iFixit Steam Deck SSD replacement guide describes it as single-sided, which is why thin, single-sided 2230 drives are the safe choice.
Valve also includes a microSD card slot (UHS-I) on every model, which is fine for older or smaller games. An internal SSD is the better place for large, demanding titles.
2. Crucial P310 1TB: Best SSD for Steam Deck Overall
The Crucial P310 1TB reads at up to 7,100MB/s and writes at up to 6,000MB/s. Crucial lists it for the Steam Deck, ROG Ally, Microsoft Surface and select Dell laptops, and says it is engineered for low power draw to help battery life on handhelds.
It uses Micron G8 NAND and has a 5-year limited warranty.
3. TEAMGROUP MP44S 2TB: Best 2TB for Steam Deck
The TEAMGROUP MP44S 2TB fits 2TB into the 22 x 30mm size, with reads up to 5,000MB/s and writes up to 3,500MB/s. TEAMGROUP adds a graphene label for heat dissipation and notes Gen4 speeds remain compatible with PCIe Gen3 interfaces.
4. WD_BLACK SN770M 1TB: Best Gaming Brand Pick
The WD_BLACK SN770M 1TB reads at up to 5,150MB/s. Western Digital names the Steam Deck and ROG Ally on the listing, and adds nCache 4.0, DirectStorage support and a 5-year limited warranty.
5. Acer MA200, Addlink S91 and fanxiang S630
The Acer MA200 1TB pairs HMB and SLC caching with a graphene heat spreader and reads up to 5,200MB/s. The Addlink S91 2TB lists a maximum height of 2.15mm and HMB support, though Addlink says it fits select Steam Deck models, so check yours first.
The fanxiang S630 1TB is the budget option, with reads up to 5,000MB/s and 5-year or 320TBW service.
How to Choose a Steam Deck SSD
M.2 2230 Only
The Steam Deck takes M.2 2230 drives; longer 2242 and 2280 drives are made for other devices. Every pick here is M.2 2230.
Single-Sided Is Safer
iFixit describes the original drive as single-sided, so a thin, single-sided replacement is the safest match.
1TB or 2TB
1TB doubles a 512GB Deck; 2TB is best if you keep many large games installed. See our best 2TB SSD for Steam Deck guide.
Plan the Software
A new SSD needs SteamOS reinstalled using Valve's SteamOS recovery instructions.
Quick Setup Tips
- Discharge the battery below 25%: iFixit recommends this before opening the Deck
- Remove the microSD card first: it can snap the back cover
- Move the ESD shield: transfer it from the old SSD to the new one
- Use the touchscreen during setup: controls may not respond at first after re-imaging
- Check the live price: use the buttons to see the current price on Amazon
Frequently Asked Questions
What is the best SSD for Steam Deck?
The Crucial P310 1TB, an M.2 2230 drive listed for Steam Deck with reads up to 7,100MB/s.
What SSD size fits the Steam Deck?
M.2 2230 NVMe. iFixit describes the original as a single-sided M.2 2230 drive.
Can I put a 2TB SSD in a Steam Deck?
Yes. The TEAMGROUP MP44S 2TB and Addlink S91 2TB are 2230 drives listed for Steam Deck.
Do I need to reinstall SteamOS?
Yes. Use Valve's SteamOS recovery instructions after installing the new drive.
Is a microSD card enough instead?
It works well for smaller or older games, but an internal NVMe SSD is faster for large titles.
The Bottom Line
The Crucial P310 1TB is the best SSD for Steam Deck for most owners. Choose the TEAMGROUP MP44S 2TB for the biggest library, or the fanxiang S630 1TB to save money.
