Faster Performance. Massive Storage: With faster read/write speeds of up to 7,250/6,300 Mb/s, a larger storage capacity of up to 4TB and 73% greater power efficiency compared with the 990 Evo, the 990 Evo Plus is the perfect productivity boost to help you tackle a busy day.Read/Write Speeds up to 7,250/6,300 Mb/s: The 990 Evo Plus features the latest Nand memory, boosting sequential read/write speeds up to 7,250/6,300MB/s. Ideal for huge file transfers and finishing tasks faster than ever.