The 'colorful' of Western Digital's hard drives is a major feature, and it is easy to distinguish between different levels of positioning, such as high-performance black disks, balanced blue disks, energy-saving green disks, NAS red disks, monitored purple disks...
Initially, the blue disk performance and power balance, speed 7200PRM, cache 16-64MB. If you do not need the high performance and high power consumption of the black disk, and think the green disk is too slow, blue disk is the best choice.
However, in 2015, Western Digital launched a 5400RPM spin-up version of the blue disk, still 3.5-inch standard, SATA 6Gbps interface, capacity 750GB, 1TB, 2TB, 3TB, 4TB, 5TB, 6TB, etc.
We have got a 2TB version, although the hard disk is already very old, it does not affect us to continue to appreciate its unique blue melody.
