Review on 💽 Corsair Flash Survivor Stealth 64GB USB 3.0 Flash Drive - Black (CMFSS3B-64GB) by Jay Elgouhari

Attached performance chart. This is on a laptop with the same test workload I use to test new cables or external drives. An older Samsung T3 SSD external drive can read or write at 250MB/s (with a maximum read speed of 350MB/s) on the same port with the same test files. No other workloads were running and that was on new, freshly formatted drives. As you can see in the graph, it maintains a decent (and advertised) speed (100MB/s) for some time and then does this weird sawtooth pattern where either the buffer fills up and we see the actual memory write speed on the Disk preserved , or something thermally slows down inside the disk - and performance craters. Actual sustained performance is <= 20MB/s writing a large file, which is absolutely terrible. This test copies only 15 GB of data. I'm literally getting better performance from ten year old SD cards. The new half-price 128GB microSDXC cards reliably support 5x faster performance. Given that this drive is clearly marketed as a high performance drive, I believe this marketing is misleading and am returning the product.