SSDs / Compare

OWC Envoy Ultra vs Sandisk Extreme PRO Portable SSD with USB4

A

Product A: OWC

Envoy Ultra

25 of 63 known

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B

Product B: Sandisk

Extreme PRO Portable SSD with USB4

30 of 63 known

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Every value links to where we found it.

Only differences

AOWC Envoy Ultra

BSandisk Extreme PRO Portable SSD with USB4

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

SDSSDE82-2T00-G25, SDSSDE82-4T00-G252Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-pro-usb-4-portable-ssdRead 14 October 2026SanDisk's own links for the page carry sku=SDSSDE82-2T00-G25 and sku=SDSSDE82-4T00-G25. TechRadar's spec table also reads SDSSDE82-2T00-G25

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

619659194376, 6196591944069Spec databasecamelcamelcamel.com/product/B0DN6DK3X4Read 14 October 2026Search summary of the 4TB SDSSDE82-4T00-G25 listing gives UPC 619659194406 and retailers list EAN 0619659194406. Search summary of Farnell Ireland's listing for the 2TB SDSSDE82-2T00-G25 gives 0619659194376, which is UPC 619659194376. Both pages block direct fetches. Both codes have valid check digits

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

November 20248Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026ChargerLAB article dated 22 November 2024 says SanDisk introduced its first USB4 portable SSD. It gives no ship date or price. Forbes places the announcement in November 2024 alongside other Western Digital flash products, but its page could not be fetched

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-extreme-pro-usb-4-portable-ssdRead 14 October 2026The page is live for the 2TB and 4TB with a sku selector

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.

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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

$279.993Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Spec table price $279 (2TB) and $429 (4TB), which are Amazon prices at review time and not stated as MSRP6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 2026Review of 3 May 2025 states MSRP $279.99 US for the 2TB and 429.99 US for the 4TB. No maker page states a price7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Asking price $279.99 (2TB) and $429.99 (4TB) in the US at review time

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.

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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

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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/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Form Factor row reads Portable SSD

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

2 TB, 4 TB1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Available Capacities row reads 2TB and 4TB. Footnote 2 says 1TB equals 1,000,000,000,000 bytes

Interface

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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

USB41Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Interface row reads USB4 Gen 3x2 (40Gb/s). The highlights say the drive supports Thunderbolt 4 hosts and works with older USB 3.2 and USB 2.0 devices

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

Yes3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026The cable is a separate item in the box and the drive has a USB-C port7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026The cable is separate from the drive. No USB-A adapter is included

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

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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

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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

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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

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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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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

3,800MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Data Transfer Rates row reads up to 3800MB/s read. Footnote 1: based on internal testing, performance may be lower depending on host device, interface, usage conditions and other factors. 1MB is 1,000,000 bytes. The same figure is given for 2TB and 4TB

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

3,700MB/s1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Up to 3700MB/s write, same footnote and same figure for 2TB and 4TB

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

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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

Min5Max45°C1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Operating Temperature 5 C to 45 C. The storage range of -20 C to 85 C is not stored

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

6 of 9 differ

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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3,717MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB (SDSSDE82-2T00-G25), tested on 9 February 2026. CrystalDiskMark 7.0 SEQ1M Q8T1 read 3,717.23 MB/s. KitGuru has not reviewed this drive, so another reviewer is used. The test file size and the drive fill are not stated. The site says its tests since 2023 use an AMD Ryzen 9 7900 PC that can test USB4 drives, and it does not name the port. Tom's Hardware printed 3,716.62 MB/s read and 3,710.54 MB/s write in CrystalDiskMark 8 default settings on a Ryzen 7600X system, and TechRadar printed 3,810 and 3,662 MB/s, which agree within 3 percent

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

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3,704MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark SEQ1M Q8T1 write 3,703.80 MB/s, same conditions

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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56.39MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark RND4K Q1T1 read 56.39 MB/s, printed as 13,766.4 IOPS in the same table. 13,766.4 x 4096 / 1,000,000 gives 56.39

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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19.4MB/s4Reviewssd-tester.com/sandisk_extreme_pro_mit_usb4_2tb.htmlRead 14 October 20262TB. CrystalDiskMark RND4K Q1T1 write 19.40 MB/s, printed as 4,736.3 IOPS. 4,736.3 x 4096 / 1,000,000 gives 19.40. ServeTheHome says the drive sustains 19 MB/second in 4K random writes

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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1,100MB/s3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 20262TB. Iometer sequential write, 1MiB blocks, queue depth 32, 15 minutes. Text says the drive writes just below 3,500 MB/s for almost three minutes, then drops to around 1,100 MB/s for about five minutes, then to around 800 MB/s for the rest. The chart shows the plateau at about 1,150 MB/s. The first drop is stored. The 800 MB/s state is not. Cache size in GB is not printed, so it is not stored. PC Gamer saw a different pattern in its own test

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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1,370points5Reviewstoragereview.com/review/sandisk-extreme-pro-with-usb4-review-fast-rugged-hugeRead 14 October 20262TB (1862GB exFAT partition). 3DMark Storage Benchmark overall score 1,370, average 229.23 MB/s at 128 microseconds. Test host: AMD Ryzen 7 9800X3D, Asus ROG Crosshair X870E Hero, DDR5-6000, RTX 4090, Windows 11 Pro. The USB port used is not stated

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)

IP653Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Text says SanDisk states an IP65 rating for water resistance7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Says SanDisk tested the drive to IEC 60529 IP65, where it withstood water flow (30 kPa) for 3 minutes

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

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2m3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Text says SanDisk says the drive should survive drops up to two meters. The surface is not stated7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Says the drive can survive a fall of 2 meters, and the claim does not detail what it fell onto

Security and software

2 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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AES 256-bit hardware encryption, Password protection6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 2026States the drive supports hardware encryption. The review gives no key length7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026Spec table Encryption row reads Hardware. Text says the drive supports hardware encryption8Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026Reads 256-bit AES hardware encryption with password protection. No maker document for this model confirms it, and TechRadar and TheSSDReview confirm hardware encryption

Software

Not available

SanDisk Memory Zone8Press articlechargerlab.com/sandisk-unveils-extreme-pro-usb4-portable-ssd-high-speed-durable-storage-up-to-4tbRead 14 October 2026Reads the drive works with the SanDisk Memory Zone app on Android. The page also says drop protection up to 3 meters, which conflicts with the 2 m in SanDisk's product title and is not used

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, macOS, PS5, Xbox Series X|S1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026System Requirements row reads Windows 10+ | macOS 14+ | Xbox Series X|S | PS5. The Compatibility row names USB Type-C devices such as laptops and tablets without naming an operating system

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

Length140Width68.7Height11.9mm(5.5 × 2.7 × 0.5 in)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Product Dimensions row reads 5.51 x 2.70 x 0.47 in | 140.00 x 68.70 x 11.90 mm. Tom's Hardware prints 140 x 68.58 x 11.94 mm, which is the same size in inches

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

172g(6.1 oz)1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Product Weight row reads 0.38 lb | 172 g

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

USB Type-C cable3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Spec table row Included: USB Type-C cable. Text says the box holds the drive, a roughly 11-inch USB-C-to-USB-C cable and paperwork

Cables includediCables supplied with an external drive.

AOWC Envoy Ultra

Not available

BSandisk Extreme PRO Portable SSD with USB4

Type	Length (m)	Count
USB-C to USB-C	0.28	1

Source3Reviewtomshardware.com/pc-components/external-ssds/sandisk-extreme-pro-with-usb4-2-tb-reviewRead 14 October 2026Roughly 11-inch USB-C-to-USB-C cable, which is about 28 cm. TechRadar says the cable is 28cm long and TheSSDReview says 12 inches6Reviewthessdreview.com/hardware/portable-ssds/sandisk-extreme-pro-usb-4-portable-ssd-reviewRead 14 October 202612-inch USB4 Type-C to Type-C cable that also powers the drive7Reviewtechradar.com/pro/sandisk-extreme-pro-with-usb4-reviewRead 14 October 2026The 28cm long USB-C cable is the only accessory

Links

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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-extreme-pro-usb-4-portable-ssd2Maker product pagesandisk.com/products/ssd/external-ssd/sandisk-extreme-pro-usb-4-portable-ssdRead 14 October 2026The SanDisk product page loads its content with scripts, so only its title (2TB SanDisk Extreme PRO with USB4) could be read. The data sheet and reviews carry the specs

Spec sheet

Not available

documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdf1Maker spec sheet (PDF)documents.sandisk.com/content/dam/asset-library/en_us/assets/public/sandisk/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 2026Two-page SanDisk data sheet for the Extreme PRO with USB4, copyright 2024, hosted on documents.sandisk.com

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/product/portable-drives/extreme-pro-usb-4-portable-ssd/data-sheet-sandisk-extreme-pro-usb-4-portable-ssd.pdfRead 14 October 20265 year limited warranty. The data sheet names no market and points to sandisk.com/wug for terms

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