Thank you! I just thought m.2 was m.2 I didn't spot the difference, so thank you :D
The crucial MX500 is a sata 3 drive that's available with the M.2 form factor (easier installation). Whereas the Evo 970 is an NVMe drive. It's a different protocol and allows significantly higher performance than sata however can cost up to twice as much per gigabyte For most people, a sata drive is more than enough in terms of performance.
Would anyone have any views on this? 250GB for £79.99 https://www.amazon.co.uk/Samsung-V-NAND-Express-Solid-State/dp/B07CGGNX7S So half the space of the original posted one, but for some reason the speeds seem massively different? read/write speeds up to 3,500/2,700 MB/s*, approximately - for the Samsung one where as the originally posted one is reads/writes up to 560/510 MB/s Why is there such a difference are they completely different types of m2 or something?
Potentially get £5 bonus https://www.amazon.co.uk/b?node=11301833031
Fitted one to a cheap laptop a few weeks ago, very speedy for a SATA drive. Faster than a WD Blue, only slightly overall slower than a Samsung 860. It does have better 4K random read performance though which is one of the most common tasks in Windows and makes everything feel very snappy.