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Testing the new SanDisk Extreme PRO with USB4 SSD proved both challenging and revealing
Mar 16, 2025
SanDisk throws its hat in the USB4 ring with a new Extreme PRO model
TechRadar Verdict
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30-second review
A tipping point has been reached where USB4 has suddenly become the connection technology for external SSDs, and a flood of new products are hitting shelves in this category.
Never a shrinking violet, SanDisk (aka Western Digital) has revamped its SanDisk Extreme PRO series with a new drive that adds “with USB4” to the end of what is already an excessively long name.
With the same styling as the previous Extreme Pro drives but scaled up, this USB-C connected external storage boasts 3800MB/s reads, and 3700MB/s writes when connected to a USB 4 compatible port. It will work with older USB standards, but the drive doesn’t come with a USB-A adapter, and the performance is significantly less if you use USB 3.2 or USB 2.0.
The specification is remarkably close to the Corsair EX400U that we reviewed recently, although this is physically bigger, and that size affords it more protection from being dropped.
Where it is less attractive than the Corsair drive is the price, which is great irrespective of where you buy this hardware.
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