External 4TB Drive: Opinions?

[Drummy]

I need a master Time Machine back-up for my entire MacPro, which will require 4TBs of external storage. What are the top suggestions for this?

Thanks.

 

[balamw]

Do you have any open bays in the Mac Pro?

B

 

[Drummy]

Do you have any open bays in the Mac Pro?

B

Unfortunately no. I have 3 bays with 1TB drives in (one of which is soon to be a 2TB drive), and there is a 64GB SSD in the 4th. I hear you can use the SATA connection reserved for the secondary DVD drive as a HDD drive connection, but if that's the case, I'd rather keep it free for when I buy new drives to replace old ones and need to transfer the data to the new drives.