
Crucial X9 Pro 4TB Portable External SSD - Up to 1050MB/s Read/Write, External Solid State Drive, IP55 Water and Dust Resistant, USB-C 3.2 - CT4000X9PROSSD902 has risen 3.1% over the last 30 days, currently at £329.99.
Price last checked: 18 Apr 2026, 16:51
The Crucial X9 Pro 4TB Portable External SSD is a high-performance external solid state drive with a 4TB capacity and USB-C 3.2 interface, offering read and write speeds up to 1050MB/s. Its compact 2.5-inch form factor and IP55 water and dust resistance make it a durable option for on-the-go use. This drive is suitable for professionals who require fast and secure data storage, such as videographers and photographers, and is compatible with a wide range of devices including Windows, Mac, and ...
At £329.99, Crucial X9 Pro 4TB Portable External SSD - Up to 1050MB/s Read/Write, External Solid State Drive, IP55 Water and Dust Resistant, USB-C 3.2 - CT4000X9PROSSD902 is at or near its lowest tracked price of £315.03. The 30-day average is £326.31, making this a good time to buy if you've been waiting for a deal.

£92.50/TB
Updated 51m ago

£110.00/TB
Updated 52m ago

£78.33/TB
Updated 40m ago

£87.50/TB
Updated 41m ago
Explains how to compare SSD endurance (TBW/DWPD), warranty terms, controller/DRAM design, and real-world performance metrics like sustained writes after SLC cache, 4K QD1 latency, and thermals.
NVMe vs SATA, TLC vs QLC, DRAM cache — cut through the jargon and pick the best SSD for your PC build or upgrade.