WD HDD: Blue, Red, Black, Ultrastar, My Passport?

Difference Between WD Blue, Red, Black, Green, Purple, Gold – NAS Compares

What are the WD colors and what do they mean?

WD Red Pro vs HGST UltraStar DC – NAS Compares

HGST - Wikipedia

Amazon.com: hdd - Western Digital / New: Electronics

Amazon.com: Western Digital 8TB Ultrastar DC HC320 SATA HDD - 7200 RPM Class, SATA 6 Gb/s, 256MB Cache, 3.5" - HUS728T8TALE6L4: Electronics

• Up to 2.5M hours MTBF with a 5 year limited OEM warrant direct with Authorized Reseller

WD My Passport: 5TB of shingled disk capacity in my shirt pocket – Blocks and Files

Shingling

The 5TB drive, claimed to be the thinnest such drive available, uses drive-managed shingling. This slows the data rewrite process as blocks of tracks have to be read, the data altered, and then the block re-written to the drive. Fresh data writes to empty tracks proceed as normal. 

Large sequential files are accepted by the drive and written with no interruption. Smaller randomly-addressed files are stored temporarily in a cache and then, when the drive is idle, written out in a sequential manner, with address translation to speed the writing process.

WD 5TB My Passport Ultra USB 3.0 Type-C WDBFTM0050BBL-WESN B&H