Retailer photo of Western Digital SN8100 4TB (Heatsink). View this offer in Where to buy
Western Digital · SSD · PCIe 5.0
Western Digital SN8100 4TB
Works well for: System Drive, Game & File Storage, Heavy Creative Work
Trade-offs: Value for money matters more to you than this exact model
- Capacity
- 4 TB
- Interface
- M.2 PCIe 5.0 x4
- Sequential read
- 14900 MB/s
- Sequential write
- 14000 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 $820 the Western Digital SN8100 4TB is priced 14% below its $955 representative market level. Crucial T705 2TB currently does the same job for $350.
Worth putting side by side:Compare with Crucial T705 2TB
Prices & availability
Where to buy the Western Digital SN8100 4TB
Compare the offers we track for this model, across variants and retailers.
4 tracked offers · 2 retailers
| Variant | Store | Condition | Price (snapshot) | Value · Balanced | Checked | Offer link |
|---|---|---|---|---|---|---|
| Western Digital SN8100 4TB (Heatsink) | Newegg | New | $820 | 89 | 2026-09-28 | View offer → |
| Western Digital SN8100 4TB | Newegg | New | $829 | 84 | 2026-09-28 | View offer → |
| Western Digital SN8100 4TB | B&H | New | $1,080 | 69 | 2026-09-28 | View offer → |
| Western Digital SN8100 4TB (Heatsink) | B&H | New | $1,852 | 51 | 2026-09-28 | View offer → |
| Western Digital SN8100 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.
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.
#2 of 359 graded solid state drives
- #1 Western DigitalWestern Digital SN8100 8TB 100
- #2 Western DigitalWestern Digital SN8100 4TB 100
- #3 Western DigitalWestern Digital SN8100 2TB 100
- #4 CrucialCrucial T710 1TB 100
- #5 Western DigitalWestern Digital SN8100 1TB 100
- #6 SamsungSamsung 9100 PRO 8TB 99
- #7 SamsungSamsung 9100 PRO 4TB 99
Value Balanced
How much of that you get for today’s price.
#9 of 359 currently priced solid state drives
- #6 CrucialCrucial T700 4TB 92
- #7 CrucialCrucial T710 1TB 91
- #8 ADATAADATA MARS 980 BLADE 1TB 91
- #9 Western DigitalWestern Digital SN8100 4TB 89
- #10 LexarLexar Professional NM1090 PRO 2TB 89
- #11 CrucialCrucial T710 2TB 88
- #12 CrucialCrucial P510 1TB 86
Performance System Drive
How much it can do. Price plays no part in this ranking.
#2 of 359 graded solid state drives
- #1 Western DigitalWestern Digital SN8100 8TB 100
- #2 Western DigitalWestern Digital SN8100 4TB 100
- #3 Western DigitalWestern Digital SN8100 2TB 100
- #4 CrucialCrucial T710 1TB 100
- #5 Western DigitalWestern Digital SN8100 1TB 100
- #6 SamsungSamsung 9100 PRO 8TB 99
- #7 SamsungSamsung 9100 PRO 4TB 99
Value System Drive
How much of that you get for today’s price.
#10 of 359 currently priced solid state drives
- #7 Western DigitalWestern Digital SN8100 1TB 84
- #8 LexarLexar Professional NM1090 PRO 2TB 84
- #9 CrucialCrucial T710 4TB 83
- #10 Western DigitalWestern Digital SN8100 4TB 80
- #11 CrucialCrucial T705 Limited Edition 2TB 79
- #12 KingstonKingston FURY Renegade G5 2TB 77
- #13 SamsungSamsung 9100 PRO 1TB 76
Performance Game
How much it can do. Price plays no part in this ranking.
#5 of 359 graded solid state drives
- #2 SamsungSamsung 9100 PRO 8TB 100
- #3 Western DigitalWestern Digital Black SN850X 8TB 100
- #4 SamsungSamsung 870 QVO 8TB 100
- #5 Western DigitalWestern Digital SN8100 4TB 50
- #6 SamsungSamsung 9100 PRO 4TB 50
- #7 KingstonKingston FURY Renegade G5 4TB 50
- #8 CrucialCrucial T710 4TB 50
Value Game
How much of that you get for today’s price.
#21 of 359 currently priced solid state drives
- #18 CorsairCorsair MP600 CORE 4TB 82
- #19 Western DigitalWestern Digital Black SN850X 8TB 81
- #20 Western DigitalWestern Digital Blue SN5100 2TB 81
- #21 Western DigitalWestern Digital SN8100 4TB 80
- #22 PatriotPatriot Viper VP4300 Lite 4TB 80
- #23 CrucialCrucial P3 Plus 4TB 80
- #24 LexarLexar NM790 4TB 79
Performance Heavy Creative Work
How much it can do. Price plays no part in this ranking.
#1 of 359 graded solid state drives
- #1 Western DigitalWestern Digital SN8100 4TB 100
- #2 KingstonKingston FURY Renegade G5 4TB 100
- #3 Western DigitalWestern Digital SN8100 2TB 100
- #4 KingstonKingston FURY Renegade G5 2TB 100
- #5 CrucialCrucial T710 4TB 98
- #6 CrucialCrucial T710 2TB 98
- #7 CrucialCrucial T710 1TB 98
Value Heavy Creative Work
How much of that you get for today’s price.
#3 of 359 currently priced solid state drives
- #1 KingstonKingston FURY Renegade G5 4TB 100
- #2 CrucialCrucial T710 4TB 98
- #3 Western DigitalWestern Digital SN8100 4TB 92
- #4 Western DigitalWestern Digital SN8100 8TB 87
- #5 Western DigitalWestern Digital SN8100 2TB 86
- #6 CrucialCrucial T705 2TB 86
- #7 SamsungSamsung 9100 PRO 2TB 83
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 Value with current priorities |
|---|---|---|
| Balanced (all-round)Weighted all-round view | GradeNo grade Value89 | Higher Value with current priorities Crucial T705 2TB 100 -3% capability · -57% price |
| System DriveScenario capability | GradeS Value80 | Higher Value with current priorities Crucial T710 1TB S 100 +0% capability · -73% price |
| Game & File StorageScenario capability | GradeS Value80 | Higher Value with current priorities TeamGroup MP44Q 4TB S 100 +0% capability · -40% price |
| Heavy Creative WorkScenario capability | GradeS Value92 | Higher Value with current priorities Crucial T710 4TB S 98 -2% capability · -15% 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
- Today's price already clears the strong-value markcheapest tracked $820 against a $962 threshold with Balanced priorities
Consider other options if
- Value for money matters more to you than this exact modelCrucial T705 2TB holds Relative Value 100 against its 89 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
- Strong-value threshold: ~$810$810 is where Relative Value reaches 80 for System Drive, in the 2026-09-28 offer frame
Consider other options if
- Current price sits $10 above the strong-value threshold (~$810)cheapest tracked $820 against a $810 calculated threshold for System Drive
- Value for money matters more to you than this exact modelCrucial T710 1TB holds Relative Value 100 against its 80 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 $820 against a $821 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 80 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
- Today's price already clears the strong-value markcheapest tracked $820 against a $1019 threshold for Heavy Creative Work
Consider other options if
- Value for money matters more to you than this exact modelCrucial T710 4TB holds Relative Value 98 against its 92 for Heavy Creative Work, at $700
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 SN8100 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
- 14900 MB/s
- Sequential write
- 14000 MB/s
- Random read
- 2300000 IOPS
- Random write
- 2400000 IOPS
- Controller
- Silicon Motion SM2508
Media
- Capacity
- 4 TB
- NAND type
- TLC 3D CBA NAND
- DRAM cache
- 4GB LPDDR4
Power / Interface
- Interface
- M.2 PCIe 5.0 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
- WDS400T1XHM00CMT0
Hover any value to see where it came from: a manufacturer specification, or a figure The Comparator calculated.
Sources: Comparator offer frame 2026-09-28
What to check in your build
M.2-2280
The slot must take M.2-2280
M.2 PCIe 5.0 x4
PCIe 5.0 M.2 slot for full speed
PCIe 5.0 — 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 5.0, 14900 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 SN8100 4TB offers a balanced view across an all-round mix of priorities. It ranks #2 by capability in the current modelled field. Its clearest measured strength is drive capability 14900. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Western Digital SN8100 4TB offers S-grade capability for System Drive. It ranks #2 by capability in the current modelled field. Its clearest measured strength is drive capability 14900. Crucial T705 2TB currently clears the same practical bar with stronger Relative Value.
Western Digital SN8100 4TB offers S-grade capability for Game. It ranks #5 by capability in the current modelled field. Its clearest measured strength is drive capability 14900.
Western Digital SN8100 4TB offers S-grade capability for Heavy Creative Work. It ranks #1 by capability in the current modelled field. Its clearest measured strength is drive capability 14900.
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 2026-09-28 · formula ssd-value-v1.5 · facts facts-2026-09-28 · 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.