Compatible with most desktop and laptop PCs, WD Green SSDs are available in 2.5” / 7mm and M.2 2280 models for simple, worry-free upgrading. What I mean by the new batch is earlier 240 GB WD Green used to cost above 2k but now it's below Rs. 1,500/-. As used for transfer speed, megabyte per second (MB/s) = one million bytes per second. Performance will vary depending on your hardware and software components and configurations. WD Green SSDs are among the lowest power consuming drives in the industry. And with less power used, your laptop runs longer. With the performance boost from a WD Green SSD drive for your desktop, you can browse the web, play a game, or simply start your system in a flash.

The Western Digital Dashboard helps users maintain peak performance of the Western Digital SSD in Windows operating systems with a user-friendly graphical interface for the user. The Western Digital Dashboard includes tools for analysis of the disk (including the disk model, capacity, firmware version, and SMART attributes) and firmware updates.Edit:- crucial ssd give u more speed than wd green ssd . Not much difference but day to day uses u notice

GB = 1 billion bytes and 1TB = one trillion bytes. Actual user capacity may be less, depending on operating environment.