






🚀 Power Your Workflow with Pro-Grade Speed & Durability
The SanDisk Professional 4TB PRO-G40 SSD delivers ultra-fast Thunderbolt 3 speeds up to 3000MB/s read and 2500MB/s write, combined with dual-mode USB-C compatibility. Engineered for professionals, it features an IP68-rated rugged design with 3m drop and 4000lb crush resistance, plus a heat-dissipating aluminum core to sustain performance. Mac-ready with APFS formatting, this external SSD is the ultimate portable powerhouse for demanding creative workflows and seamless device collaboration.









| ASIN | B0BW6715SV |
| Best Sellers Rank | #37 in External Solid State Drives |
| Brand | SanDisk Professional |
| Color | Black |
| Customer Reviews | 3.9 3.9 out of 5 stars (1,031) |
| Date First Available | May 8, 2023 |
| Flash Memory Size | 4 TB |
| Hard Drive | 4 TB Solid State Drive |
| Hard Drive Interface | USB 3.0 |
| Item Dimensions LxWxH | 4.36 x 2.28 x 0.47 inches |
| Item Weight | 4.3 ounces |
| Item model number | SDPS31H-004T-GBCND |
| Manufacturer | Western Digital Technologies, Inc |
| Product Dimensions | 4.36 x 2.28 x 0.47 inches |
| Series | SanDisk Professional PRO-G40 SSD |
C**R
Runs PERFECT as an external Windows OS drive.
I’ve been using this SanDisk NVMe in a Thunderbolt 4/USB4 enclosure as my external Windows 11 OS drive, and it’s been absolutely flawless. The build quality is excellent — the rubberized casing feels premium and offers great durability, while the metal inside keeps the drive cool under heavy use. Performance is essentially identical to an internal NVMe. I’m seeing lightning-fast boot times, near-instant app launches, and very responsive file transfers. Even when running resource-intensive programs, it performs just like an internal WD Black NVMe would. Setting it up as a bootable OS drive was straightforward using AnyBurn, and it integrates perfectly with my motherboard’s Thunderbolt boot. Windows recognizes it as NVMe, not USB, which means I get full NVMe speed and functionality, including TRIM and SMART monitoring. If you’re looking for a high-performance, reliable external NVMe drive — whether for storage or even as a bootable OS drive — this is one of the best options on the market. Durable, fast, and totally professional-grade.
M**N
Running strong & cool for 15 months.
I got this 15 months ago already, it's perfect on my iMac M1 and also latest Mac Mini 4 Pro. TRUE Thunderbolt device. Fast enough by far to use for Lightroom Catalog location as well as 36mp Nikon Raw files. LR cranks through them and are rendered 1:1 almost as fast as if they were 1:1 Previews which I no longer do now. I don't know what people are doing that they say 'it gets hot' - was never a concern for me. YES the cable works almost all the time but YES as they say there's something about the shorty that will drop and disconnect. You don't see it unmounted but will get a notification saying 'Drive was disconnected' etc. A little annoying given the cost but almost never an issue. A lot less now with the Mini Pro 4 than the M1 iMac. Maybe a stronger current, IDK. *FYI it's a higher cost now than in July 2024, for whatever reason IDK. I wish the bottom didn't have little bare metal sinks - I'm afraid it will scratch my Mini's metal. Otherwise, it's perfect.
A**T
DO NOT BUY: Constantly loses connection, no customer support
I bought this to use as a backup for my computer, as well as for music production. The thing is great when it works - it’s hella fast, and so freaking tiny. Unfortunately, the device is constantly, spontaneously “improperly ejected” from my computer. I get constant notifications/warnings. I’m using the provided cable. It should just work. It’s less than a month old. I reached out to customer support a week ago and haven’t heard anything yet - not even a “thanks for reaching out” email. It might be worth it to check out their competition. This thing is too expensive for this kind of performance and (lack of) customer service, and you’re probably buying this because you need something reliable that actually does the thing it says it should do. Update: It’s been two months and I still am having constant issues with the drive spontaneously disconnecting. I still have not heard back from customer service after reaching out to the emails provided on their website. I also just wanted to say that I’ve had the overheating issues others have mentioned when it does work. Sometimes it seems to decide to just stop working because it gets so hot (which is yet another way I lose work thanks to this thing). I’m so upset that I spent so much money on this and have lost hours/days of work because of the problems this thing has. I’m in the process of trying to jerry-rig a solution - I just spent ~$50 on different kinds of tapes and cables to try to see if that will solve the problems. I cannot caution against this thing enough. Save yourself the headaches and heartaches of losing valuable data and go with the Samsung version. It may cost more up front, but you’ll be saving yourself in more ways than you know. Update 4 months later: Still no word from “customer support”. None of the cables (or tape) I purchased to try instead of the included one solves the issue, which is how I know without a shadow of doubt it’s an issue with this joke of a product and not my computer. This has been the worst purchase I’ve made in probably a decade. I’m going to end up buying the Samsung one, so I’m just out $400 because I made the mistake of not purchasing this with a credit card that might have offered more purchase protection. I still cannot caution against this thing enough. Do not make my mistake. Spend your hard-earned money on something that’s actually worth what you’re spending. Update 1.5years later: Just wanted to come back and state again how much I hate this hard drive after looking at other hard drives again and getting super sad and annoyed that I ever bought this one to begin with. It remains probably the worst purchase I've made for as long as I can remember. Please do not make the same mistake me and others made. It's not a cheap one to make. I literally will never purchase another sandisk product again because of this experience.
S**E
High-Speed Performance with Notable Reliability Concerns
I recently purchased the SanDisk Professional 4TB PRO-G40 SSD, enticed by its impressive specifications and rugged design. Initially, the drive delivered exceptional performance, boasting read speeds up to 3000MB/s and write speeds up to 2500MB/s when connected via Thunderbolt 3 . The aluminum core and IP68 rating for dust and water resistance gave me confidence in its durability, making it suitable for on-the-go professionals. However, after a few weeks of use, I encountered several reliability issues. The drive began to intermittently disconnect, requiring multiple reconnections before it would appear in Finder on my MacBook Pro. Additionally, I experienced problems with Spotlight indexing and occasional system freezes upon ejecting the drive . Despite these challenges, the drive's speed and ruggedness remain appealing. If you're considering this SSD, be aware of potential compatibility and reliability issues, especially with macOS systems. It's advisable to ensure your system's USB-C ports provide sufficient power and to use high-quality cables to minimize connection problems.
M**D
سيء جدا .. اشتريته من شهر ودلوقتى بيعلق ومش بيشتغل وبيهنج الجهاز كله وحاجه مقرفه والبايع عمال بينزل السعر ويرفعه علي مزاجه لا انصح به تماما
S**C
Sympa mais pas le meilleur rapport qualité-prix
A**I
este disco SSD es exclusivo para Mac... para que chequen esto antes de ordenar... funciona excelente y las velocidades de transferencia de archivos es excepcional... totalmente recomendable... yo hago edicion de videos para youtube en mac y edito desde el SSD y funciona a la perfeccion...
A**R
J'ai été vraiment impressionné de la grosseur. Ça tient dans une poche. Je suis encore en train de vérifier si ça va fonctionner avec mon ancien ordinateur de 2014. Je l'ai branché sur le port usb c de mon powered hub. Vu que ça prend beaucoup plus de puissance que le port usb a. J'attends un adapteur usb a à usb c. 9 Mars 2025, ça fonctionne et c'est extrêmement rapide. J'utilise beaucoup de bibliothèques de sons. Alors c'est très pesant. Mon ancien disque dur n'était plus capable. Ça a été une histoire. Mais c'est fait. L'ordinateur est encore très bon. Je n'étais pas intéressé à le changer. La seule chose que je regrette c'est de ne pas avoir eu la possibilité d'acheter un de 8 terabytes. Le maximum était de 4 To. Aujourd'hui je l'utilise avec mon Microsoft Surface. C'est génial. Il a déjà un ssd. Mais c'est pas assez pour tout ce que j'ai besoin.
H**K
Interner SSD Festplattenspeicher bei Apple kostet das drei- bis vierfache, daher sind bei mir weiterhin externe SSD im Einsatz. Diese müssen schnell sein, bestenfalls so schnell wie die interne Mac SSD, um damit aufwendige Video- und Fotobearbeitungen durchführen zu können. Meine erste schnelle externe Thunderbolt 3 SSD, war eine Samsung MU-PB2T0B/EU Portable SSD X5, in 2021. Diese sehr gute SSD ist bei mir auch weiterhin im täglichen Dauereinsatz an einem MacBook M Pro.. Da Samsung mit der T7 und T9, aus mir unerklärlichen Gründen, keine für Mac geeigneten schnellen Thunderbolt SSD mehr anbietet, musste für den MacMini M2 Pro eine andere schnelle Thunderbolt SSD her. Und die SanDisk ist eine der ganz ganz wenigen externen Thunderbolt SSD, welche auch am Mac Thunderbolt Anschluss die beworbene Geschwindigkeit erzielt, da diese SSD eine echte Thunderbolt 3 Schnittstelle hat. Was sich am Ende auch im recht hohen Preis ausdrückt im Vergleich zu Platten die zwar mit Thunderbolt werben, aber nur eine lausige USB-C Schnittstelle verbaut haben. Aber Achtung, mit dem von SanDisk beigefügten minderwertigen Thunderbolt Kabel wie mit den meisten der erhältlichen günstigen Thunderbolt Kabel funktioniert die Platte nicht richtig und ist auch langsam. Es muss ein hochwertiges echtes Thunderbolt 3 oder 4 Kabel sein, bei mir für 60 € das Apple Thunderbolt 4 Pro Kabel. Der Preis für dieses Kabel ist nicht überzogen. Vergleichstests haben belegt, dass die Wettbewerber zwar als Thunderbolt deklarierte Kabel zum halben Preis bieten, die aber überhaupt nicht dem Intel Standard entsprechen. Da werden nur 6, 8 oder 12 der 24 PINS belegt, die PINS werden zudem überbrückt und am Chip und an der Abschirmung wird ebenso gespart. Am Ende erreicht man mit diesen Fake Kabeln nur eines, Verbindungsabbrüche, Geschwindigkeitseinbrüche und Systemabstürze. Diese Platte hier, mit dem richtigem Thunderbolt Kabel am Mac Thunderbolt Anschluss liefert was versprochen wird, nämlich fast die gleich hohen Geschwindigkeiten wie interne SSD und dabei wird sie auch nicht übermäßig heiß, was ich ausgiebig getestet habe. Beim Schreiben von 1,5 TB am Stück auf die Platte erreicht die Platte zudem dauerhaft etwa 2950 MB/s. Normalerweise müsste man 3 Sterne abziehen, dafür das SanDisk weiterhin nur dieses Billig Kabel beifügt. Ehrlicher wäre, wenn Sie gar kein Kabel beilegten oder aber nur als Option zum entsprechenden Preis ein hochwertiges Kabel mit anbieten würden, wo man aber sicher ist, dass es auch funktioniert. Ich gebe dennoch 5 Sterne für diese sehr schnelle, sehr kompakte und reisetaugliche 4 TB SSD.
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2 weeks ago
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