as the title...

The reason you should not buy any of WD Red Label hard disk drive is because some of them are SMR hard disk drives and their quality and lifespan will not be over three years.

accroding to the description of SpeceRex on youtube channel, the WD Red Label NAS hard drive will be marked as need to be replaced after using it for three years on synology NAS.

the link is here...

Stop buying WD Red Label NAS hard drive

Further reading for the issue on WD Red Label NAS hard drive