I bet this has apalling write speed.

It connects to devices using USB 3.1 at up to 5Gbps

So... it connects to devices using USB 3.0? Funny to me how ADATA is pulling an Apple here. Take a generic design that many other companies have used, add some curves to it, and suddenly it's stylish. Example: http://img.dxcdn.com/productimages/sku_146399_1.jpg

@Humanoid_1 Have you tried TRIMing the flash drives? Windows is pretty sloppy when it comes to TRIM, where it attempts to do it on a schedule rather than in real-time. That being said, flash drives have a much lower probability of being optimized since they're not always plugged in.

@schmidtbag I eventually found that flash drive hidden in a side pocket of a rucksack I rarely use. Using CrystalDiskMark 4.0.3 (same version I last tested with) I got Sequential Read & Write: Read = 218.3 MB/s Write = 63.33 MB/s Pretty happy with that for a £20 stick. Now I just need to find one of similar performance that is available to buy at such a price today.

Nice, so it was just a TRIM problem all along?