Customer reviews from SanDisk
SANDISK - PRO-G40 SSD 1TB External Thunderbolt 3 and USB-C NVMe Portable SSD - Black
Average customer rating
2.7
(12 Reviews)
Rating breakdown 12 reviews
5 Stars
4
4 Stars
0
3 Stars
2
2 Stars
0
1 Star
6
40%of customers recommend this product.
(
4 out of
10)
Customer Reviews for SANDISK - PRO-G40 SSD 1TB External Thunderbolt 3 and USB-C NVMe Portable SSD - Black
Customer Rating
1
It lost all my files and I didn't even notice
on July 1, 2026
Posted by: UPLJ
It lost all my files and I didn't even realize. I was moving some files to my NAS when my NAS gave me a warning about a folder and 11 files that it "couldn't access". Turns out I couldn't see them either on the drive. I then look at a different folder and it was COMPLETELY EMPTY, even though the drive itself still shows the same storage capacity (so the files were still taking space, I just couldn't see them). Then I go back and cross-check with other drives I have and turns out there's missing files. My back-ups had files my G40 didn't...
No, I would not recommend this to a friend.
Response from SanDiskBy SM OLS, July 6, 2026
We're sorry to hear about your experience and understand how frustrating data loss can be. Please contact us at: https://support-en.sandisk.com/app/askweb and share your host device details so we can assist you with troubleshooting, available data recovery options, and warranty support if applicable.
Written by a customer while visiting SanDisk
Customer Rating
1
FAILED AFTER A WEEK
on March 29, 2025
Posted by: AdanX
Extremely perplexed and frustrated with this product!
I've had other Sandisk SSDs and never had a single issue.
Things to take account for before buying this product:
1) No Native TRIM / Swap Optimization - macOS relies heavily on TRIM commands and swap efficiency
2) The internal SSD is WD_BLACK SN850X designed for Windows gaming, not MacOS.
3) Doesn’t officially support TRIM over Thunderbolt or USB-C on macOS.
4) Controller Not Tuned for Mac’s Virtual Memory System - will lead to mount/eject failures! And Finder freezes.
5) imagine trying to run audio to a project while also running a sample library, system unloads unused cache data to swap - yet you have no TRIM control.
Point number 4 was experienced within the first week of owning this drive. The weirdest thing is that the Sandisk Extreme actually uses a native USB controlled supported by MacOS with TRIM and swap memory support.
I hope this helps any MacOS users.
Response from SanDiskBy SM OLS, May 13, 2025
Thank you for sharing your detailed experience. We understand your frustration and value your insights regarding macOS compatibility. Your feedback will be shared with our product team to help improve compatibility in future. Let us know if we can assist you further!
Written by a customer while visiting SanDisk
Customer Rating
5
Awesome Drive for Windows
on June 7, 2024
Posted by: desolatemarauder
No issues on Windows.
I downloaded Knoppix (live Linux DVD) and used Rufus to make a bootable USB drive.
Booted from the USB drive to load Knoppix.
Launched G-Parted and formatted the APFS drive to NTFS.
Drive now recognized in Windows 11.
You could also use G-Parted Live as well but I prefer Knoppix.
Booted from the USB drive to load Knoppix.
Launched G-Parted and formatted the APFS drive to NTFS.
Drive now recognized in Windows 11.
You could also use G-Parted Live as well but I prefer Knoppix.
I would recommend this to a friend!
Written by a customer while visiting SanDisk
Customer Rating
1
66% more expensive for exFAT format?!?!
on March 19, 2024
Posted by: bluedinan
This is an example of product marketing gone terribly wrong - for 66% less money just buy the APFS formatted version of this drive, and if you need exFAT format, just format the APFS version to whatever format you want.
No, I would not recommend this to a friend.
Response from SanDiskBy SM OLS, March 29, 2024
Hello,
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, the pricings for the drives are decided by our marketing team. For any further assistance you may submit a support ticket at https://support-en.wd.com/app/askweb. We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, the pricings for the drives are decided by our marketing team. For any further assistance you may submit a support ticket at https://support-en.wd.com/app/askweb. We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
Written by a customer while visiting SanDisk
Customer Rating
1
If you have a Windows machine, don't even bother
on January 11, 2024
Posted by: PC User
I borrowed a Macbook from a friend and reformatted this drive to exFAT, which is compatible with Windows, however my Windows machine still will not recognize the drive. I have spent hours troubleshooting this drive and nothing has worked, even though in the item description they say it will work with a Windows machine if it is reformatted. Instead of offering a refund, customer "support" just wants you to keep troubleshooting, even though nothing they offer will work. What a terrible idea it was to sell this drive out of the box formatted only for MacOS. I wish I could give this product 0 stars.
No, I would not recommend this to a friend.
Response from SanDiskBy SM OLS, January 11, 2024
Hello,
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, we regret to learn about your experience. Since you have faced the issue while using the SanDisk Professional G-DRIVE PRO G-40 it would be best to get in touch with our support team so that we can investigate the issue and help you with the possible warranty replacement if required. You may submit a support ticket at https://support-en.wd.com/app/askweb. We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, we regret to learn about your experience. Since you have faced the issue while using the SanDisk Professional G-DRIVE PRO G-40 it would be best to get in touch with our support team so that we can investigate the issue and help you with the possible warranty replacement if required. You may submit a support ticket at https://support-en.wd.com/app/askweb. We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
Written by a customer while visiting SanDisk
Customer Rating
1
Impossible to Reformat for Windows
on December 8, 2023
Posted by: DeanD93
I honestly can't give a fair review, for the fact that it's impossible to figure out how to reformat the drive for Windows. Plugged it in and the computer doesn't recognize it. Go to WD's support site and none of the the threads are informative or helpful. My Windows OS is fully updated, so there's no issues with that. I can't reformat the drive because, when I follow WD's step by step process, the disk isn't even recognized. I bought the Pro-G40 because my PC is Thunderbolt 3 compatible, and this would offer the best speeds. It's super disappointing that I can't even use the product, because it's not dual compatible out of the box. If you want this for Windows I wouldn't bother. The jumping through hoops is not worth the headache.
No, I would not recommend this to a friend.
Response from SanDiskBy SM OLS, December 11, 2023
Hello,
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, we regret to learn about your experience. Since you have faced the issue while using the SanDisk Professional PRO G40 it would be best to get in touch with our support team so that we can investigate the issue and help you with the possible warranty replacement if required. You may submit a support ticket at https://support-en.wd.com/app/askweb . We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
I am Nelson from SanDisk® Global Support Team. We are sorry to hear about your experience. All of our products are manufactured on strong hardware platform to sustain daily usage. However, we regret to learn about your experience. Since you have faced the issue while using the SanDisk Professional PRO G40 it would be best to get in touch with our support team so that we can investigate the issue and help you with the possible warranty replacement if required. You may submit a support ticket at https://support-en.wd.com/app/askweb . We would be more than happy to assist you.
Thank you,
Nelson,
SanDisk® Support
Written by a customer while visiting SanDisk
Posted by: @OakMountainVisualStudio
Verified Purchase:Yes
I used this to edit a pretty hefty video, and it never blinked. Everything worked up to speed and I never had any problems with its functionality. It did get a little hot, but that would be expected with the editing I was doing on it. It looks and feels like the quality product that it is.
I would recommend this to a friend!
Written by a customer while visiting SanDisk
Customer Rating
5
Pricey but worth it
on November 22, 2023
Posted by: JBMAN
I purchased the 2TB and the 4TB. I used bitlocker on one and kept one unlocked for my Mac. These are the two fastest drives I have ever bought and the build quality is excellent. They feel great in the hand. As everyone else notes, they run quite hot when transferring files. I dont notice excess heat unless I am transferring data. I also have a nice Samsung SSD. It is great but these are much quicker and have a better apparent build quality IMO. The heat has not produced significant transfer speed impacts in my usage but I rarely transfer anything over 100GBs. The only knock is that they are quite pricey but if you have the money, grab one. If you get one that isn't transferring 1 GB/s or better exchange it. Lemons are lemons.
I would recommend this to a friend!
Written by a customer while visiting SanDisk