PC parts / SSDs
SandiskSSD
Professional PRO-G40 SSD
Released October 2022.3Press releasewesterndigital.com/de-at/company/newsroom/press-releases/2022/2022-10-05-western-digital-turbocharges-versatility-with-new-sandisk-professional-pro-g40-ssdRead 15 October 2026The release says the drive is available now in the United States in 1TB and 2TB. The first retail month is taken as October 2022. The 4TB and the GBC1D part numbers came later, and no launch month was found for them Last checked 16 October 2026.
- Interface
- Thunderbolt 3
- Form factor
- External
- Capacity
- 1 TB, 2 TB, 4 TB
- Read speed
- 3,000MB/s
30 of 63 fields known.
General
- Series
- Not available
- Model numbers
- SDPS31H-001T-GBC1D, SDPS31H-002T-GBC1D, SDPS31H-004T-GBC1D, SDPS31H-001T-GBCND, SDPS31H-002T-GBCND1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026Worldwide SKU table: SDPS31H-001T-GBC1D, SDPS31H-002T-GBC1D and SDPS31H-004T-GBC1D. The 2022 launch part numbers SDPS31H-001T-GBCND and SDPS31H-002T-GBCND come from Tom's Hardware's spec table. The sheet also lists China SKUs ending ZBC1D, which are not stored
- GTIN / EAN
- 619659209599, 619659209568, 6196592096121Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026UPC column for the worldwide SKUs: 6 19659 20959 9 (1TB), 6 19659 20956 8 (2TB) and 6 19659 20961 2 (4TB). Stored as 12-digit UPC. The sheet gives no GTINs for the GBCND launch parts
- Predecessor
- Not available
- Successor
- Not available
- Launch price (US)
- From $299.991Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 20263Press releasewesterndigital.com/de-at/company/newsroom/press-releases/2022/2022-10-05-western-digital-turbocharges-versatility-with-new-sandisk-professional-pro-g40-ssdRead 15 October 20264Press articlestoragereview.com/review/sandisk-professional-pro-g40-reviewRead 15 October 20265Press articlecomputerbase.de/2022-10/sandisk-professional-externe-pro-g40-ssd-ist-schnell-und-teuerRead 15 October 20266Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 20267Measurementtomshardware.com/reviews/sandisk-pro-g40-ssd-review/3Read 15 October 20268Measurementtomshardware.com/reviews/sandisk-pro-g40-ssd-review/2Read 15 October 2026
- Launch price (EU)
- From €4711Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 20263Press releasewesterndigital.com/de-at/company/newsroom/press-releases/2022/2022-10-05-western-digital-turbocharges-versatility-with-new-sandisk-professional-pro-g40-ssdRead 15 October 20264Press articlestoragereview.com/review/sandisk-professional-pro-g40-reviewRead 15 October 20265Press articlecomputerbase.de/2022-10/sandisk-professional-externe-pro-g40-ssd-ist-schnell-und-teuerRead 15 October 20266Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 20267Measurementtomshardware.com/reviews/sandisk-pro-g40-ssd-review/3Read 15 October 20268Measurementtomshardware.com/reviews/sandisk-pro-g40-ssd-review/2Read 15 October 2026
- Markets
- Not available
Interface
- PCIe generation
- Not available
- PCIe lanes
- Not available
- NVMe version
- Not available
Hardware
- Controller
- Sandisk in-house6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Spec table row Controller reads SanDisk Proprietary, written as Sandisk in-house like the Optimus GX PRO 850X. Text: the SSD inside is the SN750E, with the same controller as the WD Red SN700. The review tested the 2022 launch drive. No teardown of a GBC1D drive was found. Bridge chips: Intel Titan Ridge JHL7440 for Thunderbolt 3 and the ASMedia ASM2362 for USB 3.2 Gen 2. TheSSDReview names the same chips9Reviewthessdreview.com/hardware/portable-ssds/sandisk-professional-pro-g40-thunderbolt-3-dual-mode-portable-ssd-review-unbelievable-3-1gb-s-data-transfer-speedsRead 15 October 2026The review could not open the case. It says the drive uses a SanDisk SN750e M.2 SSD with an Intel JHL7440 Thunderbolt 3 controller and an ASMedia ASM2362 USB 3.2 controller
- Flash memory
- Sandisk BiCS4 TLC6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Spec table row Memory reads SanDisk 96-Layer BiCS4, the same for 1TB and 2TB. Stored for the base 2TB as the maker for all capacities. Not checked on a GBC1D drive
- Flash layers
- 966Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 202696 layers from the Memory row
- DRAM cache size
- Not available
- Component sides
- Not available
Performance
- Random 4K read (claimed)
- Not available
- Random 4K write (claimed)
- Not available
Endurance and reliability
- Endurance (TBW)
- Not available
- MTBF or MTTF (claimed)
- Not available
Power
We could not find any of these 6 fields. Show them
- Power while reading (claimed)
- Not available
- Power while writing (claimed)
- Not available
- Max power consumption (claimed)
- Not available
- Average power in light use (claimed)
- Not available
- Idle power (claimed)
- Not available
- Sleep power (claimed)
- Not available
Measured
We could not find any of these 9 fields. Show them
- Sequential read (measured)
- Not available
- Sequential write (measured)
- Not available
- Random 4K read at queue depth 1 (measured)
- Not available
- Random 4K write at queue depth 1 (measured)
- Not available
- Write cache size (measured)
- Not available
- Write speed after the cache (measured)
- Not available
- 3DMark Storage Benchmark
- Not available
- Highest temperature under load (measured)
- Not available
- Idle power (measured)
- Not available
Cooling and build
- Heatsink
- Not available
- RGB lighting
- Not available
- Drop test height
- 3m1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026Key features: up to 3m drop protection, footnote 3 based on internal testing. The surface is not stated in the sheet. The 2022 press release says the drop was onto a carpeted concrete floor3Press releasewesterndigital.com/de-at/company/newsroom/press-releases/2022/2022-10-05-western-digital-turbocharges-versatility-with-new-sandisk-professional-pro-g40-ssdRead 15 October 2026Footnote says the 3m drop was tested on a carpeted concrete floor. Launch speeds in the release were up to 2700MB/s read and 1900MB/s write over Thunderbolt 3
Security and software
- Security
- Not available
Compatibility
Dimensions and weight
Front and side, drawn to scale.
- Dimensions
- Length111Width58Height12mm(4.4 × 2.3 × 0.5 in)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026Size (LxWxH) row: 4.36 x 2.28 x 0.47 in | 111 x 58 x 12 mm. The store page prints 4.37 x 2.28 x 0.47 in
In the box
- In the box
- PRO-G40 SSD, Thunderbolt 3 (40Gbps) Cable, Quick Start Guide1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026Box contents row: PRO-G40 SSD, Thunderbolt 3 (40Gbps) Cable and Quick Start Guide
- Cables included
Type Length (m) Count USB-C to USB-C 0.2 1 Source6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Text: a relatively short 20cm (about 8 inch) USB Type-C to Type-C cable. TheSSDReview also says 20cm / 8 inch9Reviewthessdreview.com/hardware/portable-ssds/sandisk-professional-pro-g40-thunderbolt-3-dual-mode-portable-ssd-review-unbelievable-3-1gb-s-data-transfer-speedsRead 15 October 2026Comes with a 20cm / 8 inch Thunderbolt 3 cable
Links
- Product page
- www.sandisk.com/products/ssd/external-ssd/sandisk-professional-pro-g40-ssd2Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-professional-pro-g40-ssdRead 15 October 2026SanDisk US product page for the PRO-G40 SSD with a capacity picker for 1TB, 2TB and 4TB. Its spec table repeats the data sheet: up to 3000MB/s read and 2500MB/s write, Thunderbolt 3 and USB 3.2 Gen 2, 5-year limited warranty and the GBC1D part numbers
- Spec sheet
- documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdf1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 2026Two-page SanDisk data sheet for the PRO-G40 SSD, PDF created 2023-12-01, on documents.sandisk.com. It lists 1TB, 2TB and 4TB with the GBC1D part numbers
- Manual
- Not available
- EPREL registration number
- Not available
Warranty
- Manufacturer warranty (source market)
- 5years1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk-pro/product/portable-drives/pro-g40-ssd/data-sheet-sandisk-professional-pro-g40-ssd.pdfRead 15 October 20265 YR limited warranty. The sheet points to sandisk.com/wug for terms and names no market
Compare with
Pick a SSD to see both side by side. Differences are marked yellow.
Variants
Each variant lists only what differs from the specs above.
| Model number | GTIN | Launch price (US) | Launch price (EU) | Capacity | DRAM cache size | Sequential read (claimed) | Sequential write (claimed) | Sequential read (measured) | Sequential write (measured) | Random 4K read at queue depth 1 (measured) | Random 4K write at queue depth 1 (measured) | Write speed after the cache (measured) | Highest temperature under load (measured) | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SDPS31H-001T-GBC1D | 619659209599 | Not available | Not available | 1 TB | Not available | 3,000 MB/s | 2,500 MB/s | Not available | Not available | Not available | Not available | Not available | Not available | 121.2 g |
| SDPS31H-002T-GBC1D | 619659209568 | Not available | Not available | 2 TB | Not available | 3,000 MB/s | 2,500 MB/s | Not available | Not available | Not available | Not available | Not available | Not available | 122.3 g |
| SDPS31H-004T-GBC1D | 619659209612 | Not available | Not available | 4 TB | Not available | 3,000 MB/s | 2,500 MB/s | Not available | Not available | Not available | Not available | Not available | Not available | 123.1 g |
| SDPS31H-001T-GBCND | Not available | $299.99 | €471 | 1 TB | 1 GB | 2,700 MB/s | 1,900 MB/s | 3,121 MB/s | 2,700 MB/s | 43.36 MB/s | 106.95 MB/s | 1,810 MB/s | 61 °C | 121.2 g |
| SDPS31H-002T-GBCND | Not available | $449.99 | €740 | 2 TB | Not available | 2,700 MB/s | 1,900 MB/s | 3,121 MB/s | 2,680 MB/s | 39.84 MB/s | 106.25 MB/s | 1,580 MB/s | 61 °C | 122.3 g |
Sources
We read 9 sources for this SSD. The numbers match the markers in the sheet.
- Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-professional-pro-g40-ssd
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