Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems“Memory” on a Steam Deck can mean two different things: RAM, which the system uses while games are running, or storage, which holds SteamOS, games and personal files. Valve lists 16 GB of onboard LPDDR5 RAM for both LCD and OLED Steam Deck models. Internal storage is separate and varies by model, from 64 GB eMMC to 1 TB NVMe. A microSD card adds removable storage but does not add RAM.
You can check storage directly in SteamOS, then identify the RAM and original internal-drive configuration by viewing the hardware information (where available) and matching your model with Valve’s specifications.
As an Amazon Associate I earn from qualifying purchases.
RAM and storage are not the same thing
Before checking anything, decide which specification you need:
| Component | What it does | What you are trying to identify |
|---|---|---|
| RAM | Temporary working memory used by SteamOS and running games | Memory technology and installed capacity |
| Internal storage | Permanent space for SteamOS, games, downloads and files | Drive technology and model capacity |
| Removable storage | Extra space supplied by a card you insert | microSD card type and capacity |
Valve’s specifications list 16 GB LPDDR5 onboard RAM for the LCD and OLED versions covered here. That figure is separate from the capacity printed on the Deck’s box or shown in the Storage screen. Storage can be eMMC or NVMe, depending on the LCD configuration, or NVMe in the listed OLED configurations.
#1 Best Overall
- Capacity: 256GB / Interface: M.2 2230 PCIe NVME SSD
- Dimension: 22mm x 30mm x 2.38mm / Key Type: M Key
- Size: Fits 2230 as is / Compatibility: Laptop & Desktop Compatible
- Bulk Packaging - Only the Drive is included. Any screws, cables, or adapter needed are sold separately
- Warranty: 1-Year Oemgenuine Warranty
Check the Deck’s storage in SteamOS
The most reliable built-in check for current storage use is Steam’s Storage screen. It shows the internal drive and any connected storage, including a microSD card.
- Start the Deck in Gaming Mode.
- Press the Steam button.
- Choose Settings.
- Open Storage.
- Read the listed internal drive and any removable card. The screen also shows available free space.
Use this page to see where games are installed and how much space remains. Its free-space number is not the original advertised capacity: SteamOS, recovery data, formatting and other system data consume part of the drive. If a model sold as 512 GB shows less than 512 GB available, that difference is expected and does not by itself indicate a fault.
The Storage screen does not change or identify the Deck’s RAM. A microSD entry on this page is also not evidence of additional system memory; it is a separate storage device.
Look for hardware information in Gaming Mode
A current secondary walkthrough describes a hardware-information route in Gaming Mode:
- Press the Steam button.
- Open Settings.
- Select System.
- Look for Hardware and review the information shown there.
SteamOS labels can change between releases, and Valve’s official support material reviewed for this guide does not independently confirm that exact menu path. Treat it as a version-sensitive convenience. If your Deck does not show a Hardware page, use the Storage screen for the drive and identify the original model from its purchase details, packaging or model listing, then compare it with the specification table below.
Do not infer RAM from a storage value shown on this screen. A report of an NVMe drive or a 1 TB capacity describes storage, not the LPDDR5 memory used by the processor.
Match your Deck with Valve’s model specifications
Valve publishes the following configurations for the LCD and OLED specification pages reviewed in 2026. These are model specifications, not a measurement of the currently free space on an individual unit.
Free tools Windows power users keep installed
One-click scans. No signup required.
| Steam Deck family | Internal storage configuration | RAM specification | Storage technology |
|---|---|---|---|
| LCD | 64 GB | 16 GB LPDDR5 onboard | eMMC |
| LCD | 256 GB | 16 GB LPDDR5 onboard | NVMe |
| LCD | 512 GB | 16 GB LPDDR5 onboard | NVMe |
| OLED | 512 GB | 16 GB LPDDR5 onboard | NVMe SSD |
| OLED | 1 TB | 16 GB LPDDR5 onboard | NVMe SSD |
If you have an LCD Deck and the model information points to 64 GB, the original internal drive is eMMC. The 256 GB and 512 GB LCD configurations use NVMe. The listed OLED configurations use NVMe SSD storage and retain the same 16 GB LPDDR5 onboard RAM specification.
Valve notes that product specifications are subject to change. Use the table as a model-identification guide, and treat the capacity shown by your own Deck as the evidence of its current installed drive.
How to identify a changed or upgraded internal drive
The model originally sold by Valve and the drive currently installed in a used or repaired Deck are not always the same. A replacement drive can have a different capacity from the original configuration. For that reason, record both facts:
- Current drive: the capacity and device shown under Steam > Settings > Storage.
- Original model: the LCD or OLED configuration identified from purchase information, packaging or Valve’s model specifications.
For example, an LCD unit originally sold with 256 GB may now contain a replacement 1 TB NVMe drive. The Storage screen describes what is installed now; the model specification describes what that product configuration shipped with. Do not use the original model label to overwrite the current drive information.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Rank #2
- Top choice for STEAM Deck capacity upgrade. Top choice for capacity upgrade on lightweight devices
- Small-size and High Performance 22x30mm small form factor with sequential read/write speeds up to 5,000 / 3,500 MB/s
- Heat dissipating graphene label for enhanced heat dissipation and system operating stability.
- Gen4 read/write speed compatible with PCIe Gen3 interface
- Small-size solution offering TB-grade massive capacity.
Check a microSD card separately
Valve supports formatted microSD cards and documents support for UHS-I cards. To inspect one, insert it, open Steam > Settings > Storage, and look for the card as a separate storage location.
A card’s capacity belongs only to the card. It can provide more room for games and other files, but it does not increase the Deck’s 16 GB RAM, change LPDDR5 memory, or convert an eMMC drive into NVMe. If the card is missing from Storage, check that it is fully inserted and allow SteamOS to format it when prompted; formatting erases existing data on the card.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to do when the numbers do not match
The Storage screen shows less space than the advertised capacity
Compare like with like. Advertised capacity is the drive’s nominal size, while SteamOS reports usable space after the operating system, formatting and system data. A lower free-space figure is therefore normal. Check the total capacity shown for the drive, not only the remaining free space.
The Hardware menu is missing
Menu names vary by SteamOS version, and the exact Hardware route is not guaranteed. Use Steam > Settings > Storage for the current drive, then identify RAM and the original configuration from the model information and Valve’s specification figures. Do not treat the absence of a Hardware page as evidence that the Deck has a different RAM type.
A microSD card appears as internal storage
Storage management can list internal and connected locations together. Check the device name and capacity, and remove the card to see which entry disappears. The removable card remains separate from the internal eMMC or NVMe drive.
The installed drive differs from the box or receipt
Record the current Storage result and the original configuration separately. A second-hand Deck, a repaired unit or a unit upgraded by a previous owner may no longer contain its factory drive. The current drive determines available capacity; the original model determines what Valve specified for that version.
You are considering opening the Deck to read the memory
Do not open the device merely to identify its memory. Valve cautions against opening or modifying the Deck and says damage caused by such attempts is not covered by the product warranty. The software Storage screen and model documentation provide the relevant identification information without that risk.
How to report your Deck’s memory correctly
When listing or comparing a Steam Deck, write the three components separately so readers do not confuse RAM with storage:
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →| Field | Example wording |
|---|---|
| RAM | 16 GB LPDDR5 onboard RAM |
| Internal storage | 512 GB NVMe (current installed capacity) |
| Removable storage | 256 GB UHS-I microSD card, if inserted |
| Model family | LCD or OLED, based on the original model information |
This format makes clear that a 256 GB microSD card is not 256 GB of RAM, and that a Deck’s current replacement drive may differ from the capacity associated with its original sale configuration.
What the result means for upgrades
RAM is onboard. Valve’s listed 16 GB LPDDR5 is not presented as a normal user-replaceable upgrade, so buying a memory card cannot expand it. Storage is the component you can supplement most simply: a supported, formatted UHS-I microSD card adds removable game space, while the internal capacity remains the value shown for the built-in drive.
When comparing two Decks, compare internal capacity and technology directly—64 GB eMMC versus 256 GB or 512 GB NVMe on listed LCD models, or 512 GB versus 1 TB NVMe on listed OLED models. Do not compare one unit’s free-space figure with another unit’s advertised capacity, and do not count a removable card as part of onboard RAM.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Recommended Free Tools
