WD Red uses [Shingled-Magnetic-Recording.md]. Said to be less good for NAS applications than the usual writing technology (see [Shingled-Magnetic-Recording.md]): Use WD Red Plus instead.
WD Red Pro is the "big business" series for extended demands.
https://www.computerbase.de/2020-06/nas-festplatten-wd-red-plus-pro-smr/