Best SSD for Steam Deck: Storage Upgrades

The Steam Deck is a marvel of portable gaming, but one of its few limitations is its onboard storage. With modern PC games ballooning in size, even the largest Steam Deck storage tier can fill up quickly. Fortunately, upgrading the SSD is a relatively straightforward process — if you know what you’re doing. In this article, we’ll explore the best SSDs for the Steam Deck and guide you on how to choose the right one for your needs.

TLDR: Best SSDs for Steam Deck — Quick Summary

If you’re looking to expand your Steam Deck’s storage, opt for an M.2 2230 NVMe SSD with at least PCIe Gen 3 support. Great options include the Western Digital SN740 and the Samsung PM991a, both known for reliability and speed. Aim for at least 512GB if you’re a regular gamer, or go all out with 1TB or 2TB models if you plan on carrying your entire library on the go. Always ensure the SSD’s form factor and thermal output are compatible with the Steam Deck.

Why Upgrade Your Steam Deck Storage?

The Steam Deck comes in three storage variants: 64GB eMMC, 256GB NVMe SSD, and 512GB NVMe SSD. Realistically, even the 512GB model can feel cramped when modern AAA titles often require 50GB or more. Storage upgrades not only give you more room for games and apps but also improve load times and overall system responsiveness.

However, not all SSDs will fit or function optimally inside the Steam Deck. The device uses an M.2 2230 NVMe SSD, a rare form factor that limits your upgrade options — but it’s not impossible to find great choices out there.

What to Look for in a Steam Deck SSD

Before jumping into the best SSD models, here’s what you need to keep in mind when making your selection:

• Form Factor: The Steam Deck only supports M.2 2230 SSDs — these are shorter than common SSD sizes like 2280.
• Interface: It requires an NVMe PCIe Gen 3 x4 interface. PCIe Gen 4 drives will work but may not offer meaningful speed differences due to system limitations.
• Thermal Management: Since the Steam Deck is a compact, fan-cooled device, heat management is crucial. SSDs with lower thermal design power (TDP) are ideal.
• Storage Capacity: 512GB is the sweet spot for many users, while 1TB or 2TB cater to larger gaming libraries.

Top SSD Options for the Steam Deck

1. Western Digital SN740 1TB

This drive has become a fan favorite for a reason. It offers read speeds up to 5150MB/s and solid write speeds around 4850MB/s, although in the Steam Deck, these speeds may not be fully utilized. It’s power-efficient, reliable, and comes in the elusive 2230 format.

Pros:

<liHigh performance even under sustained load

<liLow thermal output

<liWidely available

Cons:

<liMore expensive than other 2230 drives

2. Samsung PM991a 1TB

Samsung’s OEM drives are popular among Steam Deck users for their high endurance and reliability. The PM991a is an excellent mid-range option that delivers reliable performance, especially for users upgrading from the 64GB eMMC model.

Pros:

<liAffordable and widely compatible

<liGood thermal efficiency

<liSamsung’s proven NAND technology

Cons:

<liMay not have the fastest write speeds for large game files

3. SK hynix BC711 512GB

Another excellent OEM option, the SK hynix BC711 is used in many laptops and offers modest speeds suitable for most users. While it’s not blazing fast, it’s a well-balanced drive for those looking to double or triple their storage without breaking the bank.

Pros:

<liGood balance of price and performance

<liLower power draw

Cons:

<liNot ideal for frequent large file transfers

Where to Buy 2230 SSDs

The hardest part about upgrading to a 2230 SSD is actually finding one. These drives are mostly OEM — meaning they’re made for manufacturers rather than end consumers. However, trusted online retailers like Amazon, Newegg, and Framework Marketplace usually have inventory. Always double-check the form factor and seller reviews before purchasing.

How to Install Your New SSD

Here’s a high-level overview of what you’ll need and the steps to swap out your SSD on the Steam Deck:

What You’ll Need:

• Small Phillips screwdriver (preferably magnetic)
• Plastic prying tool
• Thermal pad (optional but recommended)
• Bootable USB drive with SteamOS or Windows setup

Installation Steps:

1. Power off and unplug your Steam Deck.
2. Remove the back cover by unscrewing the 8 torx screws.
3. Carefully disconnect the battery connector before proceeding.
4. Locate the M.2 2230 SSD slot and unscrew the existing SSD.
5. Slide in your new SSD and reattach the screw.
6. Optionally apply a thermal pad to help with heat dissipation.
7. Reconnect the battery and screw the case back together.
8. Boot from your USB drive and reinstall the OS.

Note: Any hardware updates carry warranty risks. Proceed only if you’re confident in your ability, or seek professional help.

Do MicroSD Cards Still Matter?

Yes! Even if you upgrade your internal SSD, MicroSD cards are still very handy for game storage. SteamOS makes switching between internal and external storage seamless. While not as fast as NVMe storage, a good UHS-I or UHS-II MicroSD card still delivers playable performance for most titles.

Use your SSD for frequently played or larger games, and the MicroSD for emulators, indie titles, or archived content.

Performance Differences: Upgraded SSD vs Stock

After upgrading to a quality NVMe SSD, you’ll notice:

• Faster boot times and OS updates
• Shorter game loading screens
• Reduced stuttering in open-world games

While the benefits won’t transform your Steam Deck into a powerhouse, they make the experience smoother and more future-proof.

Final Thoughts

Upgrading your Steam Deck’s SSD is one of the best ways to enhance its performance and usability. With the right M.2 2230 NVMe drive, you’ll enjoy faster loading, more room for games, and better overall responsiveness. Whether you choose a high-end drive like the Western Digital SN740 or a budget-conscious option like the SK hynix BC711, you’re making a smart investment in your gaming setup.

Before you begin, double-check form factor compatibility, prepare the tools you need, and always back up your data. Happy modding and enjoy the expanded possibilities of your upgraded Steam Deck!