Amazon WorkSpaces now use solid-state drives (SSD) at no additional cost

Starting today, all new Amazon WorkSpaces will use general purpose SSD Elastic Block Store (EBS) volumes at no additional cost. SSD EBS volumes provide superior I/O performance when compared to magnetic volumes, which results in improved application start times, boot times and a better user experience when running applications sensitive to disk latency. 
Quelle: aws.amazon.com