I have a Synology NAS 918+ with 3TB WD Green drives. I have them running for some years.
2 disks are showing errors once and a while. I'm not sure if I should replace them all (quite costly, just bought the DS918+).
What disks would you advise to use (home usage, running virtual machine manager but could buy the SSD cache to optimize speed).
3TB is good enough, 4 TB is also an option. Budget is around 300 Euro.