Console and handheld storage: PS5 M.2 expansion and small SSDs
M.2 SSDs expand PlayStation 5 storage if they meet interface, size, cooling, and speed requirements, while handhelds like Steam Deck rely on microSD cards for extra capacity. Compatibility depends on form factor keys, slot types, and thermal design.
PS5 M.2 expansion slot requirements
To expand a PlayStation 5 console's storage, a user must install an M.2 NVMe SSD that meets the specifications in the PlayStation M.2 SSD support guide: a PCI-Express Gen4x4 interface, a Key M socket, capacities between 250 GB and 8 TB, one of the 2230, 2242, 2260, 2280, or 22110 form factors, a width up to 25 mm including any cooling structure, a thickness up to 11.25 mm, and a recommended sequential read speed of 5,500 MB/s or faster. SATA-based M.2 drives are not supported.
The slot accepts both single-sided and double-sided drives, but a built-in or attached heatsink is necessary. The console's formatting process on first boot erases all data on the drive, so installation should be done with the system powered off and the user grounded to avoid static damage.
M.2 form factors, keys, and interfaces
M.2 is a small form factor used widely in laptops and desktops. According to SNIA's SSD form factor resource, SSDs come in NVMe, SAS, and SATA flavors and can be built in many different physical shapes, including EDSFF, M.2, and 2.5-inch. For client devices, M.2 is common because it takes little space.
Samsung's internal SSD installation FAQ notes that its NVMe M.2 drives use the 2280 form factor, measure 22 by 80 mm, and rely on M-key slots for four PCIe lanes; B-key slots provide fewer lanes or SATA support.
According to KIOXIA's client SSD page, the BG and EG series offer M.2 2230, 2242, and 2280 single-sided form factors with PCIe Gen4 or Gen5 and capacities up to 2,048 GB, while the XG10 series reaches 4,096 GB in the 2280 size.
Handheld storage with microSD
Handheld consoles such as the Steam Deck do not expose a user-accessible M.2 slot for expansion. Instead, they provide a microSD card slot for additional storage. Valve's Steam Deck tech specs list a high-speed microSD slot that supports UHS-I cards, with compatibility for SD, SDXC, and SDHC cards. The internal storage is a 512 GB or 1 TB NVMe SSD, depending on model.
microSD cards come in families defined by the SD Association. The SD Association's card choice page explains that SD, SDHC, SDXC, and SDUC cards differ in capacity, and that bus interface speeds such as UHS-I, UHS-II, and UHS-III affect transfer rates. The page also lists speed classes for video recording and application performance classes for running apps from the card.
When selecting a microSD card for a handheld, the host device's supported bus interface matters. A UHS-I slot will not reach the higher speeds of a UHS-II card, so checking the console's specification for the slot type is important. The Steam Deck's UHS-I support limits sustained throughput compared with an internal NVMe drive, but still provides a convenient way to store more games.
Compatibility checklist and installation tips
Before buying an M.2 SSD for a PS5, verify the interface, keying, physical size, and cooling. The checklist in the table below summarizes the requirements from the PlayStation support guide.
Installation steps include grounding yourself, removing the console's cover, adjusting the spacer to the drive length, inserting the drive at an angle, and fastening it down. After reattaching the cover, the console will prompt a format. The drive's existing data will be erased during that step.
The choice of form factor also depends on the motherboard or device slot. Some laptops use the shorter 2230 size, while desktops often accept 2280. A separate overview of gaming consoles compares storage and performance across major platforms.
| Requirement | Value | Notes |
|---|---|---|
| Interface | PCIe Gen4x4 NVMe | M.2 SATA not supported |
| Capacity | 250 GB to 8 TB | Drive formatted on first use |
| Form factor | 2230, 2242, 2260, 2280, 22110 | Length codes in millimeters |
| Dimensions | Width up to 25 mm, thickness up to 11.25 mm | Includes heatsink |
| Read speed | 5,500 MB/s or faster recommended | Faster may still differ from internal SSD |
| Cooling | Heatsink or heat transfer sheet required | Single- or double-sided accepted |
| Socket | Socket 3 (Key M) | Matches the PS5 expansion slot |
Frequently asked questions
Can a PS5 accept any M.2 SSD?
No, it requires a PCIe Gen4x4 NVMe drive with an M key, a length from 2230 to 22110, a width up to 25 mm, and a heatsink; SATA M.2 drives are not supported.
Does the Steam Deck support M.2 expansion?
The Steam Deck does not provide a user-accessible M.2 slot; expansion is done through its microSD slot, which supports UHS-I SD, SDXC, and SDHC cards.
What is the difference between B-key and M-key M.2 slots?
A B-key slot supports SATA or PCIe NVMe with up to two lanes, while an M-key slot supports NVMe with up to four PCIe lanes; Samsung NVMe SSDs use M-key.
Do M.2 SSDs come with mounting screws?
M.2 SSDs generally do not include screws; motherboard and console manufacturers provide the necessary screws and spacers.
