How-To: Choose the best external hard drive for your Mac (or iOS device!)


I feel old saying this, but having used computers since before external hard drives existed, I can say with certainty that buying a hard drive is easier today than it’s ever been before. For traditional drives, prices are low, options are numerous, and capacities are so high that your only choices are “enough space,” “more than enough space,” and “way more than enough space.” I could point you towards a gigantic 5-Terabyte $139 Seagate USB 3.0 hard drive right now and end this article without another paragraph. Since Apple doesn’t even sell a Mac with that much disk space, you could back up five (or more) computers to that drive without running out of room. Or you could store a decade worth of digital photos alongside a giant media library. For $139!

But buying an external hard drive isn’t necessarily that simple. There are a bunch of factors worth considering before making a purchase, including everything from reliability to portability, design, capacity, speed, and connectivity. Some hard drives are really cheap but have a higher chance of failing after a year or two of heavy use. So in this How-To, I’m going to discuss the big issues you need to consider, and guide you towards the best external hard drive for your needs…

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Review: OWC Mercury Elite Pro Mini dual-drive external enclosure with RAID


One of the reasons I like Macs is that their useful life tends to be significantly longer than that of a typical Windows machine. This is especially true of the pre-Retina MacBook Pro models, where it’s trivial to upgrade both the RAM and the drive.

I’d previously swapped out the 750GB hard drive and optical drive that came with my late-2011 MacBook Pro 17 for two 1TB hard drives. Along with a RAM upgrade, that gave me a 16GB RAM, 2TB hard drive machine. The plan was to use the machine in that form for a year or two, then do a further upgrade to SSDs once 1TB models arrived and fell to a halfway sensible price.

When that finally happened, and I did the upgrade, that gave me two 1TB hard drives surplus to requirements. I could have placed each into its own external drive caddy, but one 2TB drive is more useful than two 1TB ones, so I decided instead to try out OWC’s Mercury Elite Pro mini. This is an external enclosure for two 2.5-inch drives, which supports both USB 3 and Firewire 800, drawing power from either source – making it a portable drive without the need for external power …  Read more