Large Capacity HDD's (6TB-20TB)

Agree though my post was more about ppl consolidating data from older multiple 2/4TB drives.

It depends a lot on luck which also incl operating conditions. Btw, just curious what is the longest running power on time you have achieved on your drives. For me the record is approx. 80000 hours.

Agree but many incl myself need such drives to consolidate data across multiple internal/external hdd & as for backup, the chances of those external portable 4TB drives going bad is likely more than internal 4TB drives because of the cooling factor & the inherent nature of usb connector/port.