Seagate’s Desktop SSHD was one of the first 3.5in desktop hybrid drives to launch. Hybrid drives look to alleviate the lack of storage capacity available from SSDs by combining a mechanical hard disk with a smaller amount of NAND flash memory to speed up access times for frequently-used files. Thanks to technologies such as Triple Level(TLC) cells and vertically stacked chips, SSDs keep getting bigger, but the cost per GB of an SSD is still considerably higher than in mechanical disks and will likely remain so for a long time. Hybrid drives aim to be the best of both worlds in giving you the capacity of a mechanical hard disk combined with some of the speed advantages of an SSD.