I'm thinking of doubling my current storage and getting a 4TB hard drive, but I don't know what to get. I've narrowed it down price-wise (under $150 AUD) to either an internal hard drive (like a WD Blue 4TB (5400RPM) or a Seagate Barracuda 4TB (5400 RPM)) and a USB 3.0 to SATA Enclosure, or an...