SanDisk Extreme PRO Portable SSD 4TB with USB4 — 3,800 MB/s Read, 3,700 MB/s Write
3,800 MB/s read3,700 MB/s writeUSB4 Gen 3x2, 40 GbpsIP65, 4TB
This is the fastest portable drive SanDisk makes: the Extreme PRO with USB4, published at up to 3,800 MB/s read and up to 3,700 MB/s write over a USB4 Gen 3x2 (40 Gbps) connection. Part number SDSSDE82-4T00-G25 is the 4TB model. USB4 is the interface that finally matters for Mac and modern laptop owners, because it is the one their machines actually have — where the older 20 Gbps Extreme PRO is capped on those computers, this drive is not. It comes in a forged aluminium chassis inside a rugged silicone shell, rated IP65, and it is a substantially bigger object than the drives below it in the range.
Compatibility — check before buying:
Read the three trade-offs before you order, because this drive is not simply “the better one”. First, the host: 3,800 MB/s needs a USB4 or Thunderbolt 4 port. SanDisk states backwards compatibility with USB 3.2 and USB 2.0, but publishes no fallback speed figure — on an ordinary 10 Gbps port the drive simply runs at that port’s ceiling, and we will not print a number SanDisk does not. Second, and this one surprises people: SanDisk publishes no encryption for this drive at all. No AES, no password protection — where the 20 Gbps Extreme PRO publishes 256-bit hardware encryption. If your data must be protected, that is a genuine reason to buy the slower model. Third, the physical trade: 170 g against 77.5 g for the Gen 2x2 model, a 2 m drop rating rather than 3 m, an operating floor of 5 °C rather than 0 °C, and only a USB-C to USB-C cable in the box — no USB-A cable and no adapter. On a PS5 the usual console rule still applies: PS5-format games are stored and archived, not launched. Tell us the machine and we will confirm the port before you order.
Best For
✓ Modern Macs and USB4 or Thunderbolt 4 laptops
✓ Video editing directly from an external drive
✓ Multi-stream 4K and 8K timelines
✓ Large ingests where write speed decides the day
✓ Location work in rain and dust
✓ Anyone whose current drive is the bottleneck
Key Features
3,800 read and 3,700 write
Both directions published for this capacity, and both are close to internal NVMe territory. This is the point at which an external drive stops being a place to put files and becomes somewhere you can actually work from without noticing.
USB4 — the port your machine probably has
The older 20 Gbps Extreme PRO needs USB 3.2 Gen 2x2, which no Mac implements. USB4 and Thunderbolt 4 are on every recent Mac and most current laptops, so on those machines this drive is dramatically faster than the model below it rather than marginally so.
Forged aluminium inside a rugged shell
The aluminium chassis pulls heat away from the controller, which is what keeps a 3,800 MB/s drive at speed through a long write, and the silicone shell takes the knocks. IP65 dust and water resistance is published.
4TB of genuinely usable working space
At these speeds 4TB is not an archive that sits still — it is a working volume. A full 4K project can live on it and be edited in place rather than copied back to an internal drive first.
Technical Specifications
| Identification |
| Brand |
SanDisk |
| Series |
Extreme PRO with USB4 — in-box name: Extreme PRO USB4 Portable SSD |
| Part Number |
SDSSDE82-4T00-G25 |
| EAN / GTIN |
0619659194406 |
| MPN |
SDSSDE82-4T00-G25 |
| Drive |
| Capacity |
4TB |
| Type |
Portable external SSD |
| Interface |
USB4 Gen 3x2 (40 Gbps) |
| Connector |
USB Type-C |
| Compatibility |
Backwards compatible with USB 3.2 and USB 2.0; Thunderbolt 4 supported |
| Performance |
| Sequential read |
Up to 3,800 MB/s |
| Sequential write |
Up to 3,700 MB/s |
| Host requirement |
A USB4 or Thunderbolt 4 port is needed for the published speeds |
| Speed on a slower port |
SanDisk publishes no fallback figure; on a USB 3.2 port the drive runs at that port’s ceiling |
| Durability and security |
| IP rating |
IP65 water and dust resistance |
| Drop resistance |
Up to 2 m — lower than the 3 m rating of SanDisk’s Gen 2x2 and Gen 2 Extreme drives |
| Encryption |
SanDisk publishes none for this model — no AES and no password protection, unlike the 20 Gbps Extreme PRO |
| Operating temperature |
5 °C to 45 °C; storage −20 °C to 85 °C |
| Physical |
| Dimensions |
139.95 × 68.58 × 11.94 mm |
| Weight |
170 g |
| Chassis |
Forged aluminium with a rugged silicone shell |
| In the box |
| Contents |
Extreme PRO USB4 Portable SSD, USB Type-C to Type-C cable, Quick Install Guide, SanDisk Warranty Guide |
| USB-A cable or adapter |
Not included |
| Cable length |
Not published |
| System requirements |
| Computers |
Windows 10 and later, macOS 14 and later |
| Consoles |
Xbox Series X|S and PlayStation 5 are listed by SanDisk — note that on a PS5 an external drive stores and archives PS5 games rather than running them |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
SanDisk publishes a 5-Year Limited Warranty on this model on both its global and UK/EU pages. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration. |
Frequently Asked Questions
Will this be faster than the 2,000 MB/s Extreme PRO on my Mac?
Dramatically, yes — and this is the key point. No Mac implements USB 3.2 Gen 2x2, so the 2,000 MB/s model is capped at roughly 1,000 MB/s on every Mac ever made. Macs do have Thunderbolt and USB4, which this drive uses. On a Mac the gap between the two drives is nearly four times, not twice.
Does it have encryption?
No. SanDisk publishes no encryption specification for this drive — no AES, no password protection — on its global page, its UK page or its datasheet. That is a real step back from the 20 Gbps Extreme PRO, which publishes 256-bit hardware encryption. If protecting the contents matters more than speed, buy that one instead.
What do I get on an ordinary USB-C laptop port?
Whatever that port can do. SanDisk states backwards compatibility with USB 3.2 and USB 2.0 but publishes no fallback speed, so we will not print one. On a 10 Gbps port expect around 1,000 MB/s in practice — the drive is not the limit there, the port is. Send us the machine model and we will check its port specification.
Why is it so much bigger than the other Extreme drives?
170 g and 140 mm long, against 77.5 g and 110 mm for the Gen 2x2 model. A 40 Gbps controller running at full speed produces real heat, and the larger forged aluminium chassis is how SanDisk sheds it without throttling. The trade is a drive that lives in a bag rather than a pocket.
Singular Expert Insight
The interesting thing about this drive is that its advantage depends entirely on what you own. On a modern Mac or a USB4 laptop it is close to four times the real-world speed of the 20 Gbps Extreme PRO, because that model’s interface is one no Mac supports. On an ordinary 10 Gbps machine the two perform the same and the cheaper one wins. So this is not a straightforward upgrade — it is the right drive for a specific class of computer. Two things it gives up are worth stating plainly:
no published encryption at all, where the Gen 2x2
Extreme PRO publishes hardware AES-256, and a 2 m drop rating rather than 3 m. For anyone carrying client material under an obligation to protect it, that first point outweighs the speed. And at these rates the drive is genuinely an editing volume rather than a transport, which is a different way of working: if that is the plan, size it for the whole project rather than for a copy of it.
Buyer’s Guide
Buy it if
Your machine has USB4 or Thunderbolt 4 and you want to edit straight off an external drive. 3,800 read, 3,700 write, IP65 and a forged aluminium chassis built to hold that speed.
Skip it if
Your ports are ordinary 10 Gbps USB-C — the cheaper Extreme performs the same there. Skip it too if the data must be encrypted, since SanDisk publishes no encryption for this model at all.
Also consider
The 20 Gbps Extreme PRO if you need hardware AES-256 and a 3 m drop rating. A 1,050 MB/s Extreme if your ports are 10 Gbps. A desktop drive if the 4TB is for archive rather than editing.