I'm moving towards a system of having data backed up on internal drives I'll use with a OWC Thunderbay and separate external drives as well. I'm trying to decide what size internal drives to use. I'm choosing between drives that are 2tb, 3tb and 4tb's large. I imagine I get more bang for my buck with 4tb. I'm tempted to go that route. I'll have everything backed up so I don't worry about the fact that, if it fails, it's 4tbs. That said......any other thoughts on this matter? Is there another way to think/approach it? Just brainstorming before buying stuff. Thanks in advance!!