Retailer photo of Western Digital SN7100 4TB. View this offer in Where to buy
Western Digital · SSD · PCIe 4.0
Western Digital SN7100 4TB
Works well for: System Drive, Game & File Storage, Heavy Creative Work
Trade-offs: Current price sits $63 above the strong-value threshold (~$507)
- Capacity
- 4 TB
- Interface
- M.2 PCIe 4.0 x4
- Sequential read
- 7000 MB/s
- Sequential write
- 6700 MB/s
- Endurance
- 2400 TBW
- Form factor
- M.2-2280
Move a slider and the page re-scores this product against the same market frame.
Is this a good buy today?
Market confidence: MediumAt $570 the Western Digital SN7100 4TB is priced in line with its $575 representative market level. Only 2 verified new offers stand behind it, so the level can move quickly.
Consider: Crucial T705 2TB offers stronger value around $350.Compare
Prices & availability
Where to buy the Western Digital SN7100 4TB
Compare the offers we track for this model, across variants and retailers.
3 tracked offers · 2 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| Western Digital SN7100 4TB | CentralComputer | New | $570 | 74 | 2026-09-27 | View offer → |
| Western Digital SN7100 4TB | Newegg | New | $580 | 73 | 2026-09-27 | View offer → |
| Western Digital SN7100 4TBMultiple variants available | Amazon Affiliate | Varies | Find on Amazon | Not tracked | No price snapshot | Find on Amazon → |
Prices are dated snapshots, not live quotes — confirm the final price at the store. New, refurbished and used offers are listed separately; used offers carry warranty and seller risk.
Show the other 1 tracked offers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| Western Digital SN7100 4TB | Newegg | Used | $464 | 85 | 2026-09-27 | View offer → |
Where it stands in the field
Two different questions, side by side. Performance compares what the hardware can do; Value compares what that capability costs at today’s price. A product can rank high on one and low on the other — that gap is the point.
Performance Balanced
How much it can do. Price plays no part in this ranking.
#115 of 385 graded solid state drives
- #112 CrucialCrucial P310 1TB 48
- #113 CrucialCrucial P310 1TB 48
- #114 CrucialCrucial P310 500GB 48
- #115 Western DigitalWestern Digital SN7100 4TB 47
- #116 SabrentSabrent Rocket Plus 4TB 47
- #117 TeamGroupTeamGroup Cardea A440 2TB 47
- #118 CorsairCorsair MP600 ELITE PS5 2TB 47
Value Balanced
How much of that you get for today’s price.
#32 of 385 currently priced solid state drives
- #29 Western DigitalWestern Digital SN8100 8TB 78
- #30 KingstonKingston FURY Renegade G5 4TB 76
- #31 PNYPNY CS2150 2TB 75
- #32 Western DigitalWestern Digital SN7100 4TB 74
- #33 PatriotPatriot Viper VP4300 Lite 2TB 73
- #34 TeamGroupTeamGroup MP44Q 2TB 73
- #35 Western DigitalWestern Digital WD Blue SN5000 4TB 72
Performance System Drive
How much it can do. Price plays no part in this ranking.
#115 of 385 graded solid state drives
- #112 CrucialCrucial P310 1TB 48
- #113 CrucialCrucial P310 1TB 48
- #114 CrucialCrucial P310 500GB 48
- #115 Western DigitalWestern Digital SN7100 4TB 47
- #116 SabrentSabrent Rocket Plus 4TB 47
- #117 TeamGroupTeamGroup Cardea A440 2TB 47
- #118 CorsairCorsair MP600 ELITE PS5 2TB 47
Value System Drive
How much of that you get for today’s price.
#77 of 331 currently priced solid state drives
- #74 TeamGroupTeamGroup FORCE G70 PRO Aluminum 2TB 30
- #75 TeamGroupTeamGroup Cardea A440 1TB 30
- #76 SamsungSamsung 990 EVO Plus 2TB 30
- #77 Western DigitalWestern Digital SN7100 4TB 29
- #78 TeamGroupTeamGroup FORCE G70 PRO Aluminum 4TB 29
- #79 Western DigitalWestern Digital Black SN850X 1TB 29
- #80 SeagateSeagate FireCuda 530R 2TB 28
Performance Game
How much it can do. Price plays no part in this ranking.
#39 of 385 graded solid state drives
- #36 CrucialCrucial T500 4TB 50
- #37 CrucialCrucial P310 4TB 50
- #38 TranscendTranscend 250S 4TB 50
- #39 Western DigitalWestern Digital SN7100 4TB 50
- #40 SabrentSabrent Rocket Plus 4TB 50
- #41 Western DigitalWestern Digital Blue SN5100 4TB 50
- #42 KingstonKingston NV3 4TB 50
Value Game
How much of that you get for today’s price.
#7 of 385 currently priced solid state drives
- #4 CrucialCrucial T705 4TB 94
- #5 Silicon PowerSilicon Power UD90 4TB 92
- #6 Western DigitalWestern Digital Blue SN5100 4TB 92
- #7 Western DigitalWestern Digital SN7100 4TB 91
- #8 KingstonKingston NV3 4TB 90
- #9 CrucialCrucial T710 4TB 88
- #10 CrucialCrucial T700 4TB 88
Performance Heavy Creative Work
How much it can do. Price plays no part in this ranking.
#78 of 385 graded solid state drives
- #75 TeamGroupTeamGroup FORCE G70 PRO Graphene 2TB 49
- #76 TeamGroupTeamGroup FORCE G70 PRO Aluminum 2TB 49
- #77 TeamGroupTeamGroup FORCE G70 PRO Aluminum 1TB 49
- #78 Western DigitalWestern Digital SN7100 4TB 48
- #79 Western DigitalWestern Digital Blue SN5100 4TB 48
- #80 Western DigitalWestern Digital Blue SN5100 2TB 48
- #81 Western DigitalWestern Digital Blue SN5100 1TB 48
Value Heavy Creative Work
How much of that you get for today’s price.
#43 of 290 currently priced solid state drives
- #40 CrucialCrucial T700 1TB 37
- #41 CrucialCrucial T700 1TB 36
- #42 TeamGroupTeamGroup MP44Q 4TB 34
- #43 Western DigitalWestern Digital SN7100 4TB 30
- #44 CorsairCorsair MP700 Elite 1TB 30
- #45 TeamGroupTeamGroup FORCE G70 PRO Aluminum 4TB 30
- #46 Western DigitalWestern Digital Blue SN5100 2TB 29
These ladders follow the preset scenario shown above. Your own weights re-score this product, not the whole field.
What it is good for
| Scenario | this productCapability grade · Value at current price | Higher capability | Higher Value with current priorities |
|---|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value74 | Higher capability Crucial T710 1TB 91 +113% capability · -61% price | Higher Value with current priorities Crucial T705 2TB 100 +107% capability · -39% price |
| System DriveScenario capability | GradeS Value29 | Higher capability Higher capability · Higher Value with current priorities Crucial T710 1TB S 100 +113% capability · -61% price | |
| Game & File StorageScenario capability | GradeS Value91 | — | Higher Value with current priorities TeamGroup MP44Q 4TB S 100 +0% capability · -14% price |
| Heavy Creative WorkScenario capability | GradeS Value30 | Higher capability Western Digital SN8100 2TB S 85 +109% capability · -27% price | Higher Value with current priorities Lexar Professional NM1090 PRO 2TB S 91 +94% capability · -37% price |
Balanced has no letter: it is a weighting preset, not a capability rubric. A grade answers “how well does this handle that job?” — price is never part of it. Relative Value puts the current market price back in.
Trade-offs
Works well if
- System Drive is your main prioritygraded S for System Drive on the same rubric as the tier list
- Strong-value threshold: ~$507$507 is where Relative Value reaches 80 with Balanced priorities, in the 2026-09-27 offer frame
Consider other options if
- Current price sits $63 above the strong-value threshold (~$507)cheapest tracked $570 against a $507 calculated threshold with Balanced priorities
- Value for money matters more to you than this exact modelCrucial T705 2TB holds Relative Value 100 against its 74 with Balanced priorities, at $350
Works well if
- System Drive is your main prioritygraded S for System Drive on the same rubric as the tier list
Consider other options if
- You want strong value for System Drive specificallycompeting products deliver so much more for System Drive per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelCrucial T710 1TB holds Relative Value 100 against its 29 for System Drive, at $220
Works well if
- Game is your main prioritygraded S for Game on the same rubric as the tier list
- Today's price already clears the strong-value markcheapest tracked $570 against a $691 threshold for Game
Consider other options if
- Value for money matters more to you than this exact modelTeamGroup MP44Q 4TB holds Relative Value 100 against its 91 for Game, at $493
Works well if
- Heavy Creative Work is your main prioritygraded S for Heavy Creative Work on the same rubric as the tier list
Consider other options if
- You want strong value for Heavy Creative Work specificallycompeting products deliver so much more for Heavy Creative Work per dollar that no price this model realistically trades at reaches the strong-value mark for this job
- Value for money matters more to you than this exact modelLexar Professional NM1090 PRO 2TB holds Relative Value 91 against its 30 for Heavy Creative Work, at $360
Every line states the fact it was derived from, for the scenario selected above. Thresholds are calculated points on our value curve — information about where the maths turns, not instructions about what to pay.
Similar options to the Western Digital SN7100 4TB
Chosen for Balanced
Chosen for System Drive
Chosen for Game
Chosen for Heavy Creative Work
Alternatives stay near this product’s price range. Step-up options may exceed the standard budget envelope when the capability gain is meaningful.
Upgrade planner
Judge the change in the active scenario, then make the cash gap explicit.
Using page scenarioWhat are you upgrading from? These are the axes we compare on, and where this product stands in the current market.
Capability differences are expressed as tiers and index points, not as benchmark percentages we did not measure.
Specifications & compatibility
What this product is, and what to check before it goes into your build.
Performance
- Sequential read
- 7000 MB/s
- Sequential write
- 6700 MB/s
- Random read
- 0 IOPS
- Random write
- 0 IOPS
- Controller
- SanDisk Custom
Media
- Capacity
- 4 TB
- NAND type
- SanDisk BiCS8 TLC
- DRAM cache
- None (DRAM-less)
Power / Interface
- Interface
- M.2 PCIe 4.0 x4
- Form factor
- M.2-2280
Physical / Outputs
- Heatsink included
- No
Show all specifications
Endurance & warranty
- Endurance
- 2400 TBW
- Warranty
- 5 years
- Manufacturer part number
- WDS400T4X0E
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-09-27
What to check in your build
M.2-2280
The slot must take M.2-2280
M.2 PCIe 4.0 x4
PCIe 4.0 M.2 slot for full speed
PCIe 4.0 — runs in older slots at their speed
Fits under an M.2 shroud
Bare drive — it fits under a motherboard M.2 shroud
Meets the PS5 expansion requirements
M.2 2280 NVMe, PCIe 4.0, 7000 MB/s read — meets Sony's published requirements; a heatsink is required
Found an error? Report this specification Email the field, corrected value and an optional source.
Compatibility guidance is practical help, not a score. Missing data is shown as unknown, never invented.
Summary
Western Digital SN7100 4TB offers a balanced view across an all-round mix of priorities. It ranks #115 by capability in the current modelled field. Its clearest measured strength is drive capability 7000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Western Digital SN7100 4TB offers S-grade capability for System Drive. It ranks #115 by capability in the current modelled field. Its clearest measured strength is drive capability 7000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Western Digital SN7100 4TB offers S-grade capability for Game. It ranks #39 by capability in the current modelled field. Its clearest measured strength is drive capability 7000. TeamGroup MP44Q 4TB currently clears the same practical bar with stronger Relative Value.
Western Digital SN7100 4TB offers S-grade capability for Heavy Creative Work. It ranks #78 by capability in the current modelled field. Its clearest measured strength is drive capability 7000. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
FAQ
Why does Relative Value change when I choose another scenario?
Each scenario changes the weights applied to capability, price and the other published factors. The hardware facts stay fixed, but the value question changes, so its score and rank can change too.
Why can Amazon appear without a tracked price?
Amazon is shown as a discovery link when we do not have a permitted verified price snapshot. It is excluded from price comparisons, rankings and Relative Value until a compliant tracked price exists.
Useful links & sources
offer frame 2026-09-27 · formula ssd-value-v1.5 · facts facts-2026-09-27 · Relative Value is an estimate from our current dataset, the selected weights and dated market prices — not an official product rating and not a price forecast. Target prices are calculation thresholds, not predictions. Methodology We are not a shop. Affiliate links may earn us a commission; they never change the calculations or the ranking.