If you go with the
WD Red watch the model number. There was some recent controversy about the labeling and the storage method. See
https://arstechnica.com/gadgets/2020/06/western-digital-adds-red-plus-branding-for-non-smr-hard-drives/
Using 4 of the Red WD40EFRX 4TB in a RAID 5 configuration in my NAS with no issues.
Using 4 of the Red WD40EFRX 4TB in a RAID 5 configuration in my NAS with no issues.