Random IO
Random read/write performance matters if you copy a lot of small files or use the drive as storage for games and applications that are directly run off the drive.
Sequential IO
Sequential performance is relevant when you copy large files—videos, for example.
Sustained Write Speeds
Thanks to the large heatsink, the Teamgroup MP34 drive cranks through the entire test without breaking a sweat, sustaining full performance with an average of 781 MB/s. This shows that the included black aluminium heatsink is truly valuable; a heatsink is absolutely something you should look for when buying an enclosure like this.