WD's Green SATA III 2.5" Internal SSD provides 240GB of storage capacity while operating on an average of 50mW of power, which enables your battery-powered notebook to run longer. WD Green SSDs have 540 MB/s read and 465 MB/s write speeds along with SLC caching technology that enables burst write performance to boost your daily computing activities. This SATA-based drive is 7mm high and fits into a 2.5" drive bay of your notebook, desktop, or external storage device. With no moving parts, it is more reliable than a spinning hard drive. Additionally, WD includes free downloadable WD SSD Dashboard software, so you can monitor the health of this solid-state drive.