SN770M vs MP600 Mini 2TB: Which SSD for Your Steam Deck?
Your 2TB shortlist includes an SN770M, a Mini and a similarly named Core Mini. How do the three drives differ, and how much of a 7,000MB/s rating can a Steam Deck use?
- For a Steam Deck capacity upgrade, buy the less expensive 2TB TLC drive after matching warranty coverage and delivered cost. The SN770M and revised MP600 Mini both carry a 1,200TBW rating.
- The MP600 Mini R2 has higher advertised Gen4 sequential speeds. The Deck uses PCIe 3.0, so its 7,000MB/s rating does not establish a corresponding advantage in game loading.
- Look for CSSD-F2000GBMP600MNR2 for the 2TB Mini. The Core Mini is a separate QLC product. Both Deck generations use single-sided M.2 2230 storage, with different disassembly guides.
The hardest part of comparing these drives is identifying what a retailer is actually selling. “MP600” covers several products, “Mini” has appeared on more than one hardware revision, and adding “Core” changes the NAND type. A review that abbreviates a name can leave you comparing the wrong Corsair drive against the WD_BLACK SN770M.
Start with two exact 2TB products, then decide whether the extra specification is useful in the machine you own. For a Deck that keeps running out of room, the purchase is primarily about how much storage you gain. Specifications below were checked on October 30, 2026.
Identify the two TLC drives before comparing prices
| 2TB specification | WD_BLACK SN770M | Corsair MP600 Mini R2 |
|---|---|---|
| Model / SKU | WDBDNH0020BBK-WRSN / WDS200T3X0G | CSSD-F2000GBMP600MNR2 |
| Form factor | M.2 2230 | M.2 2230 |
| Interface | PCIe 4.0 x4 NVMe | PCIe 4.0 x4 NVMe |
| NAND | TLC | TLC |
| Sequential read, up to | 5,150MB/s | 7,000MB/s |
| Sequential write, up to | 4,850MB/s | 6,500MB/s |
| Write endurance rating | 1,200TBW | 1,200TBW |
| Limited warranty | 5 years or write limit, whichever comes first | 5 years, subject to write-endurance conditions |
The SN770M entries come from Sandisk’s July 2025 data sheet. Corsair’s product page identifies the revised 2TB SKU and TLC NAND; its endurance table lists 1,200TBW. The R2 speed ratings are in the 2TB column of Tom’s Hardware’s 2024 model specification table. That article’s tested drive is 1TB; its results do not become a 2TB benchmark.
Check the selected retailer option, rather than relying on the main photograph. A listing that groups capacities or variants can show the right packaging while selecting a different drive. The complete SKU, capacity, seller and warranty route make a useful comparison line.
Corsair’s limited warranty terms end coverage at the earliest of the time limit, stated endurance limit or maximum SMART Percentage Used. Matching headline years and TBW does not make every claim condition identical.
Core Mini and the original Mini are different purchases
Corsair’s Steam Deck storage guide separates the TLC Mini from the QLC Core Mini. The latter can be a budget option, but a lower price is partly buying a different specification. Its 2TB model, CSSD-F2000GBMP600CMN, has a 450TBW rating in Corsair’s support table, compared with 1,200TBW for the revised Mini.
The original Mini adds another wrinkle for 1TB shoppers. Real Hardware Reviews identifies CSSD-F1000GBMP600MN as the original version and CSSD-F1000GBMP600MNR2 as the revision. For the 2TB TLC model discussed here, the number is CSSD-F2000GBMP600MNR2. A bargain on an original 1TB Mini is a different capacity decision.
Review comparisons need the same care. StorageReview’s SN770M review tested the 2TB Core Mini among its competitors. Reading an abbreviated Corsair name as the revised TLC Mini changes the opponent. A conclusion about that older comparison cannot settle this exact two-drive purchase.
What the Deck can use from a Gen4 SSD
The Deck uses PCIe 3.0 for storage. Valve’s original LCD technical sheet lists Gen3 x4 NVMe configurations, and Corsair’s Deck guide describes the Gen3 limitation. Installing a Gen4 SSD does not upgrade the host connection.
The R2’s advertised read ceiling is about 36% higher than the SN770M’s; its write ceiling is about 34% higher. Those calculations compare maximum sequential specifications. They cannot be turned into the same percentage improvement in loading a game on the Deck.
Sequential transfers describe moving a stream of data. Starting a game also involves finding files and preparing their contents. Downloads add the network and installation work to the path. A faster storage specification only changes the part of a task that can benefit from it.
The host limitation makes the 7,000MB/s ceiling a weak reason on its own to pay extra for a Deck upgrade. With equal capacity and suitable warranty coverage, the lower delivered cost is the useful buying criterion. At equal delivered prices, the revised Mini is a reasonable pick for its higher Gen4 specification. Any later reuse still depends on the next device’s actual slot and compatibility.
Battery-life comparisons also need matching capacities and conditions. A table containing a 1TB Mini result and a 2TB SN770M result does not isolate the difference between the two 2TB products. Treating it as that comparison combines a capacity choice with a product choice.
If the current drive has enough space and your complaint is low frame rates, replacing it with another SSD of the same capacity has a weak case. The processor, graphics and memory remain the same. Buying more room for installed games is a much clearer objective than expecting the drive’s advertised throughput to solve a rendering limit.
A 512GB owner gains more than a 1TB owner
Using manufacturers’ decimal capacities, replacing 512GB with 2TB adds 1,488GB and makes nominal storage about 3.91 times as large. Replacing 1TB with 2TB adds 1,000GB and doubles it. These are replacements: the old internal drive does not stay installed alongside the new one.
| Current capacity | Nominal space added by 2TB | Question to answer |
|---|---|---|
| 256GB | 1,744GB | Do a few large installs force constant deletions? |
| 512GB | 1,488GB | Do you need several large games available together? |
| 1TB | 1,000GB | Does the library you want installed exceed the current space? |
As a planning example, a hypothetical 100GB game makes the added space roughly 14.9 game-sized units for a 512GB owner, versus ten for a 1TB owner. Actual installations also require the operating system and room for updates. Adding the installed sizes of your own games produces a better estimate than counting titles.
A nominal 2TB is two trillion bytes, or approximately 1.82TiB before operating-system and filesystem use. A smaller number in a binary-unit display does not mean a seller supplied less storage. Keep the units consistent when estimating the benefit of an upgrade.
Price comparisons then become straightforward. First decide whether the extra terabyte over a 1TB purchase is worth its price difference. Once 2TB is the requirement, compare the two exact 2TB products including shipping and warranty arrangements. Switching capacities halfway through the comparison obscures the cost of the space you actually want.
Prepare for your Deck generation and the OS installation
Both generations require a single-sided M.2 2230 SSD. The dimensions are 22mm wide and 30mm long. A common desktop 2280 drive is 80mm long and does not become a replacement just because it also uses M.2. The short form factor and mounting requirements are part of the purchase.
Use the LCD replacement guide or the OLED replacement guide for your machine. Their tool lists differ: Phillips drivers for LCD, T6 Torx for OLED. LCD units also have internal design revisions. The common storage format does not make their covers and disassembly sequences identical.
Before opening the case, preserve the files you need, follow the guide’s battery preparation, shut down and unplug the device, and remove its microSD card. iFixit specifies a battery charge below 25% and warns that leaving the card installed while removing the back can break it. Follow the model-specific sequence for disconnecting the battery and transferring the SSD shielding.
Physical installation is only part of the job. The replacement still needs an operating system; use Valve’s SteamOS installation and repair instructions for the software stage. A blank drive is a different starting point from an existing installation that needs repair.
Keep the original SSD until the new installation boots and the files you intended to preserve are available. Purchasing a replacement does not copy the old drive. If your plan includes an external enclosure for transferring or retaining it, include that enclosure and the necessary tools in the upgrade cost.
Which one belongs in the cart?
Choose the SN770M when it delivers the same 2TB TLC capacity and suitable warranty coverage for less. Choose the exact Mini R2 when its delivered price is equal or lower. The Deck’s connection prevents either drive from delivering its advertised Gen4 sequential ceiling.
A deeply discounted Core Mini remains a separate budget decision: 2TB of QLC storage with a 450TBW rating. It is not the same specification on sale. Put the complete model number, capacity and warranty route on the order before deciding which price is better.