I began testing the SanDisk Professional Pro-G40 SSD by connecting it via a Thunderbolt 3 port to a 2022 MacBook Air with the M2 chip and starting up Blackmagic Disk Speed Test. This registered write speeds of up to around 2800MB/s and read speeds of around 2604MB/s, both higher than the values indicated on the packaging.
Next, I dragged 9.74GB of images comprising 100 Jpegs and 100 raw files from the 45.7Mp Nikon Z7 II from the MacBook Air’s desktop to the drive. The files transferred in around 5 seconds. Transferring the files the other way took about the same amount of time. That’s impressively fast and great news if you’re a hurry to shift files from one place to the other.
Those speedy transfer rates translate into solid performance when you’re processing images. The drive mounts quickly and thumbnails render in a flash in a browser like Adobe Bridge. I was even to able to open all 200 of the Nikon Z7 II files in Adobe Camera Raw in next to no time and they were rendered very quickly ready for processing.
Similarly, the drive operates well as a working drive when you’re editing 4K video. Its speed of data transfer means that, provided your computer is up to the job, you have a fluid editing experience with out and stutter or dropped frames.
As usual, the Pro-G40 SSD warms up during use, but it doesn’t get excessively hot.
Not having convenient access to water that’s 1.5m deep, I dropped the SanDisk Professional Pro-G40 SSD into a glass of water with the USB/Thunderbolt port uppermost and left it fully-submerged for 30 minutes. After half an hour, I removed the drive from the water and dried it off, before leaving it for around an hour to ensure that there was no water in the Thunderbolt port to cause a connection issue. Once it was completely dry, I reconnected the drive to a computer and it was all systems go.