SSDs / Compare

OWC Envoy Ultra vs Sandisk Professional PRO-G40 SSD

A

Product A: OWC

Envoy Ultra

25 of 63 known

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B

Product B: Sandisk

Professional PRO-G40 SSD

30 of 63 known

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All 63 fields

Every value links to where we found it.

Only differences

AOWC Envoy Ultra

BSandisk Professional PRO-G40 SSD

General

4 of 9 differ

Series

Not available

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Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

TB5ENVU02, TB5ENVU04, TB5ENVU082Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026OWC's own MacSales store. SKU TB5ENVU02 for the 2TB model, TB5ENVU04 for 4TB and TB5ENVU08 for 8TB. The U suffix sku TB5ENVU02U is a used or open-box listing with the same UPC and a 2 year warranty, so it is not stored

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

810159621793, 810159621809, 8101596218162Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026UPC 810159621793 for the 2TB (JSON-LD of the product page). 810159621809 is the 4TB and 810159621816 the 8TB3Maker product pageeshop.macsales.com/item/OWC/TB5ENVU04Read 15 October 20264Maker product pageeshop.macsales.com/item/OWC/TB5ENVU08Read 15 October 2026

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

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

12 September 20246Press releaseowc.com/news/owc-launches-envoy-ultra-thunderbolt-5-ssdRead 15 October 2026OWC press release dated 12 September 2024, Woodstock, IL

5 October 20223Press 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 2026Western Digital press release dated 2022-10-05, San Jose, California

Status

Available2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Structured data on the 2TB page shows InStock on 2026-10-15. The 2TB, 4TB and 8TB pages are all live

Available2Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-professional-pro-g40-ssdRead 15 October 2026The page is live in October 2026 with the three GBC1D SKUs. Amazon US showed the 4TB at rank 51 in External Solid State Drives with 1,098 reviews

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

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SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

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Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$399.996Press releaseowc.com/news/owc-launches-envoy-ultra-thunderbolt-5-ssdRead 15 October 20262.0TB at $399.99 and 4.0TB at $599.99 US dollars at launch, no tax stated

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)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

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

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

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ColoursiThe maker's own colour names

Black2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Housing Color: Black. Housing Material: Aluminum

Black1Maker 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 2026Color column reads Black for every SKU

Form factoriPhysical size of the drive. External is any drive in its own case that connects by cable. A drive sold in two M.2 lengths is two products. Xbox expansion card is a card for the storage expansion slot of an Xbox Series console.

External2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Portable drive in its own aluminum case with a captive cable, so external. The drive mechanism is a 2.0TB OWC Aura Pro IV PCIe 4.0 NVMe M.2 2280 SSD, and OWC reserves the right to replace it with equivalent or better components

External1Maker 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 2026Portable SSD in a rugged case that connects by a USB-C port, so stored as external

CapacityiNominal capacity before formatting, in decimal GB. A published 1 TB is 1000 GB. A published 1024GB stays 1024. The marketed capacity is stored, not a raw or usable figure from the same table, such as OWC's 2048 GB total and 1920 GB usable for a 2.0TB drive.

2 TB, 4 TB, 8 TB2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Spec table: Total Capacity 2048GB, with 1920GB usable and 128GB allocated to real-time data redundancy and error correction. The 4TB lists 4096GB total and 3840GB usable, the 8TB 8192GB total and 7680GB usable. The product is sold as 2.0TB, 4.0TB and 8.0TB, so the marketed 2000, 4000 and 8000 GB are stored3Maker product pageeshop.macsales.com/item/OWC/TB5ENVU04Read 15 October 20264096GB total, 3840GB usable, 256GB allocated to redundancy and error correction4Maker product pageeshop.macsales.com/item/OWC/TB5ENVU08Read 15 October 20268192GB total, 7680GB usable, 512GB allocated to redundancy and error correction6Press releaseowc.com/news/owc-launches-envoy-ultra-thunderbolt-5-ssdRead 15 October 2026Launch capacities 2.0TB and 4.0TB7Press releaseowc.com/ca/news/other-world-computing-introduces-8tb-envoy-ultra-thunderbolt-5-ssdRead 15 October 2026OWC press release dated 5 January 2026 announces the 8TB model, available that day through OWC.com, Amazon and MacSales.com

1 TB, 2 TB, 4 TB1Maker 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 2026Capacity column: 1TB, 2TB and 4TB. Footnote: 1 TB = 1 trillion bytes

Interface

2 of 5 differ

InterfaceiFastest host connection the drive is rated for. The PCIe generation of an NVMe drive is its own field. A Thunderbolt drive that also works over USB uses its Thunderbolt version.

Thunderbolt 51Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Page headline: The First and Fastest Thunderbolt 5 Portable SSD. Real-world speeds are given for Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 (Mac only) and USB4, so the drive is rated for Thunderbolt 5 at the top2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Host Port Thunderbolt 5 (USB-C) up to 80Gb/s. Maximum data rate is up to 40Gb/s on USB4. Chipset: Thunderbolt JHL9480. Host interface requirements are Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 (Mac only) or USB4

Thunderbolt 31Maker 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 2026Interface row reads Thunderbolt 3 (40Gbps) and SuperSpeed USB 10Gbps (USB 3.2 Gen 2). Stored as the highest mode, Thunderbolt 3

PCIe generationiHighest PCIe generation the drive supports, e.g. 5 for PCIe 5.0. NVMe drives only. A drive rated for PCIe 4.0 x4 or 5.0 x2 is 5 with 2 lanes, and the source note names both modes.

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PCIe lanesiLanes the drive uses at its highest PCIe generation, usually 4. NVMe drives only.

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NVMe versioniVersion of the NVMe specification as published. A revision letter is left out, so 2.0d is stored as 2.0.

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Detachable cableiExternal drives. No means the cable is fixed to the drive.

No1Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Built-in Thunderbolt cable. The footnote says a damaged cable is a user serviceable item, available from 20252Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Captive Cable: (1) Thunderbolt 5 (USB-C), 23.3 cm long

Yes6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026The drive has a reinforced USB-C port and a Type-C to Type-C cable is in the box

Hardware

4 of 7 differ

ControlleriController maker and model as named by the maker or a review. On an external drive, the controller of the SSD inside, not the USB or Thunderbolt bridge chip. The bridge chip goes in the source note.

Phison E27T9Reviewmigovi.com/en/owc-envoy-ultra-portable-ssd-performance-reviewRead 15 October 2026Migovi opened a 2TB Envoy Ultra and names the OWC Aura Pro IV inside, with a Phison PS5027-E27T controller, written Phison E27T like the other catalog drives. OWC reserves the right to change the internal components and the 4TB MacSales Aura Pro IV listing agrees. An older 2TB Aura Pro IV used another controller in a 2022 PCWorld review

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 typeiBits stored in each flash cell. TLC stores three and QLC stores four. A maker can use another flash type in some capacities, so it is per variant.

TLC9Reviewmigovi.com/en/owc-envoy-ultra-portable-ssd-performance-reviewRead 15 October 2026Kioxia BiCS6 162-layer 3D TLC

TLC6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Text: 1TB of 96-layer BiCS4 TLC in two 512GB packages

Flash memoryiFlash maker and generation as named by the maker or a review.

Kioxia BiCS6 TLC9Reviewmigovi.com/en/owc-envoy-ultra-portable-ssd-performance-reviewRead 15 October 2026Kioxia BiCS6 162-layer 3D TLC

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 layersiStacked layers of the 3D flash, from the maker or a review.

1629Reviewmigovi.com/en/owc-envoy-ultra-portable-ssd-performance-reviewRead 15 October 2026162-layer

966Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 202696 layers from the Memory row

DRAM cacheiDRAM is a memory chip on the drive. HMB is a drive without DRAM that borrows host memory. None has neither. HMB not stated is a drive without DRAM where no source says whether it borrows host memory. An external drive counts when a source names the cache of the drive inside.

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DRAM6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Spec table row DRAM reads DDR4 for both capacities. Text: the drive has DRAM, so no Host Memory Buffer

DRAM cache sizeiSize of the DRAM on the drive. Any DRAM type counts, such as DDR4 or LPDDR4X. Host memory buffer (HMB) is not DRAM on the drive.

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Component sidesiWhether chips sit on one or both sides of the board. Thin laptops and some handhelds need single-sided drives. M.2 drives only. The M.2 module code states it: S is single-sided and D is double-sided, e.g. 2280-S3-M or 2280-D5-M.

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Performance

2 of 4 differ

Sequential read (claimed)iMaker's up-to sequential read speed for this capacity. Test conditions are in the source note.

6,000MB/s1Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Footnote: up to 6000MB/s sequential read/write (max), tested with a 2.0TB OWC Aura Pro IV equipped Envoy Ultra on a Windows 11 PC with an Intel Core i9-14900HX and 32GB 5600MHz RAM, AJA System Test, 4K-Full resolution, 64GB file size, 16bit RGB codec, single file test. The headline says over 6000MB/s. OWC's footnote says longer write sessions sustain 1350MB/s (2TB) and 1700MB/s (4TB), which has no field

3,000MB/s1Maker 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 2026Data Transfer Rate row, Thunderbolt 3: up to 3000MB/s read. USB-C: up to 1050MB/s read, not stored. Footnote: internal testing, 1 MB/s = 1 million bytes per second, performance may vary by host device, usage conditions and drive capacity. The same figure is given for all three capacities

Sequential write (claimed)iMaker's up-to sequential write speed for this capacity. Makers usually measure it inside the fast write cache.

6,000MB/s1Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Same AJA System Test footnote as read: up to 6000MB/s for the 2TB drive. The page does not state a different figure for the 4TB or 8TB

2,500MB/s1Maker 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 2026Thunderbolt 3: up to 2500MB/s write. USB-C: up to 1000MB/s write, not stored. Same figure for all three capacities

Random 4K read (claimed)iMaker's up-to random read speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Random 4K write (claimed)iMaker's up-to random write speed with 4 KB blocks. Queue depth and threads are in the source note. The maker's headline claim. Makers test at different queue depths, so compare with care. The queue depth 1 measured fields compare better.

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Endurance and reliability

0 of 3 differ

Endurance (TBW)iTerabytes that can be written within the warranty, as the maker rates them.

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MTBF or MTTF (claimed)iMean time between failures, or mean time to failure when the maker publishes MTTF. The source note says which. Some makers state it per capacity, so it is per variant.

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Operating temperatureiMaker's operating range. The storage range is not stored.

Min5Max35°C2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Ambient temperature operating 5 C to 35 C (41 F to 95 F). Non-operating range of -20 C to 60 C is not stored5Owner's manualeshop.macsales.com/manuals/owc-envoy-ultra-support-manualRead 15 October 2026Operating temperature 5 C to 35 C

Min5Max35°C1Maker 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 2026Operating Temperature row: 41 to 95 F | 5 to 35 C

Power

None of 6 known

Power while reading (claimed)iMaker's average power during sequential reads, including a figure given at the full read speed. A single average or active figure with no read and write split, such as Corsair's, is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Read, is a peak and is not stored.

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Power while writing (claimed)iMaker's average power during sequential writes. A single average or active figure with no read and write split is stored in both read and write, and the source note says so. A maximum figure, such as Kingston's (MAX) Write, is a peak and is not stored.

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Max power consumption (claimed)iMaker's peak or maximum power figure. Not the average while reading or writing. Kingston publishes max read and max write power apart. Store the higher one and name both in the source note.

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Average power in light use (claimed)iMaker's average over a mixed client workload such as MobileMark. Not idle power and not read or write power.

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Idle power (claimed)iMaker's idle power in the PS3 state with APST on, or the state the maker calls low-power idle. On a SATA drive, Slumber counts as low-power idle. A plain idle figure with no low-power state, often near 1 W, is active idle and is not stored. Samsung's Idle with DIPM on is a SATA link power state, so it counts as low-power idle.

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Sleep power (claimed)iMaker's power in the deepest sleep state, PS4 or L1.2. On a SATA drive this is DevSleep.

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Measured

None of 9 known

Sequential read (measured)iCrystalDiskMark SEQ1M Q8T1 read result from a reviewer. Host and slot are in the source note. KitGuru's default profile counts as SEQ1M Q8T1.

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Sequential write (measured)iCrystalDiskMark SEQ1M Q8T1 write result from a reviewer. Host and slot are in the source note.

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Random 4K read at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 read result from a reviewer. Small reads one at a time, close to everyday use. KitGuru's 4K QD1 1 Thread test counts as RND4K Q1T1. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Random 4K write at queue depth 1 (measured)iCrystalDiskMark RND4K Q1T1 write result from a reviewer. A CrystalDiskMark result printed in IOPS is stored as IOPS x 4096 / 1,000,000 MB/s, the way CrystalDiskMark converts.

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Write cache size (measured)iData written at full speed in one long sequential write on an empty drive before the speed drops.

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Write speed after the cache (measured)iWrite speed in the first state after the fast cache is full, when the drive writes straight to TLC or QLC. Tom's Hardware calls it TLC mode. The slower folding state and the lowest dip are not stored. Only from a long sequential write test.

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3DMark Storage BenchmarkiOverall score measured by a reviewer. Host and slot are in the source note. From StorageReview only. Tom's Hardware scores the same drive about 30 percent higher, so other reviewers are not mixed in.

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Highest temperature under load (measured)iHighest drive sensor reading in a sustained write test of 10 minutes or more, on the bare drive unless the row is a heatsink version. Short benchmark runs do not count. Heatsink, airflow and room temperature go in the source note.

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Idle power (measured)iReviewer's idle reading. Power-saving settings such as ASPM are in the source note. A value read from a chart image counts when the source note says "read from chart".

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Cooling and build

2 of 4 differ

HeatsinkiVersions sold. The base lists every version and each variant row lists its own. A water block or a cooler with a fan counts as a heatsink. A thermal pad or label alone is bare. A heatsink in the box that the buyer fits, as on the XPG MARS 980 BLADE, counts as with heatsink.

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RGB lightingiAny version sold has lighting the user can set. A status LED alone does not count. Leave it out when no version has lighting. The Heatsink rows show which version has it.

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Dust and water ratingiPublished IP rating of an external drive.

IP671Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Crushproof, dustproof and waterproof IP67 rated. Footnote: waterproof for up to 30 minutes at under 1 meter, and the plug end of the built-in cable is not waterproof2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026IP Rating row: IP67 (dust-tight, protected against the effects of temporary immersion in water)

IP681Maker 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: high-level IP68 dust/water resistance

Drop test heightiMaker-published tested height. Surface and conditions are in the source note.

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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

1 of 2 differ

SecurityiFeatures the maker names for the drive. Encryption done by host software does not count. ATA Security passthrough counts as password protection.

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Software

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SanDisk SSD Dashboard6Reviewtomshardware.com/reviews/sandisk-pro-g40-ssd-reviewRead 15 October 2026Text: SanDisk also provides its own SSD Dashboard software

Compatibility

1 of 1 differ

PlatformsiPlatforms the maker names for this drive. A PS5 needs a heatsink on an internal drive. PC is for a maker that writes Client PCs or PC without naming an operating system. Handheld PCs go in Other with a source note.

macOS, Windows, Linux, ChromeOS, iPadOS1Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026Page says Macs, PCs, iPad Pros, Chromebooks and Surface devices. The MacSales spec table names macOS, Windows 11, Ubuntu Linux, iPadOS and Chrome OS2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Mac OS: macOS 14, 15 and 26. PC: Windows 11. Linux: Yes, latest Ubuntu. Mobile: iPadOS 17, 18 and 26. Other: Chrome OS. The drive ships APFS formatted and other platforms must reformat it. Android is not stored, since the table lists no Android version5Owner's manualeshop.macsales.com/manuals/owc-envoy-ultra-support-manualRead 15 October 2026macOS 14.x or later (Thunderbolt 5 needs 15.3.x), Windows 11, Chrome OS, iPadOS and Ubuntu

Windows, macOS1Maker 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 2026Operating Systems row: macOS 10.13+ (Time Machine compatible), Windows 10+. The drive ships formatted exFAT, APFS via reformat

Dimensions and weight

2 of 2 differ

DimensionsiLength is the long side. Height is the thickness, including a fitted heatsink. As the maker publishes it. A maximum counts. Length is the long side even when the maker lists the width first.

Length130Width75Height20mm(5.1 × 3 × 0.8 in)2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Height 2.0 cm, Length 13.0 cm, Width 7.5 cm. The captive cable is not included in the length. Stored as 130 x 75 x 20 mm

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

WeightiDrive alone, with a heatsink when it is sold fitted. No cable and no packaging. As the maker publishes it. A maximum counts. Not a measured weight.

341g(12 oz)2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026341.0 g (0.75 lbs). The same on the 4TB and 8TB pages. Thunderbolt Laptop lists about 327 g (10.5 oz), so the OWC figure is used

122.3g(4.3 oz)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 2026Weight row: 1TB 121.2 g, 2TB 122.3 g and 4TB 123.1 g. Base value is the 2TB model

In the box

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In the box

OWC Envoy Ultra External Storage Solution, OWC Envoy Ultra Getting Started QR Insert Card, Support Manual for OWC Envoy Ultra (digital), 5 Year OWC Limited Warranty2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Includes row: OWC Envoy Ultra External Storage Solution, Getting Started QR Insert Card, digital Support Manual and a 5 Year OWC Limited Warranty. The text is the same on the 2TB, 4TB and 8TB pages

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 includediCables supplied with an external drive.

AOWC Envoy Ultra

Not available

BSandisk Professional PRO-G40 SSD

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

Not compared

Product page

www.owc.com/solutions/envoy-ultra1Maker product pageowc.com/solutions/envoy-ultraRead 15 October 2026

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

Not available

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

eshop.macsales.com/manuals/owc-envoy-ultra-support-manual5Owner's manualeshop.macsales.com/manuals/owc-envoy-ultra-support-manualRead 15 October 2026Support Manual for OWC Envoy Ultra

Not available

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

5years2Maker product pageeshop.macsales.com/item/OWC/TB5ENVU02Read 15 October 2026Includes list says 5 Year OWC Limited Warranty. The US store page names no other warranty for the new product. SHI and Thunderbolt Laptop say 3 years, which OWC's page and support manual do not5Owner's manualeshop.macsales.com/manuals/owc-envoy-ultra-support-manualRead 15 October 20265-Year Limited Warranty, not transferable

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

Both are also in the API. Back to all SSDs.