The Western Digital My Book (model: WDBFJK0030HBK) for Mac 3TB hard drive offers a good balance of storage, features and speed. #1 Pick WD My Book 3TB WD My Book Duo Hard Drive, a top hard drive for mac. Seagate 2TB USB 3.0 Backup Plus Slim Portable With that in mind, what features are most important in an external hard drive? What are some of the hard drives currently available for your Mac? Top 6 External Hard Drives for Mac Regardless of whether you will be storing personal memories or files from work, choosing the right Mac external hard drive is vital to protecting your digital valuables. You might also be interested in the best external hard drives for Xbox One. Adding an external hard drive can increase your storage by orders of magnitude, giving you ample room for backups, movie collections, music libraries, ongoing projects and more. Especially if you have a MacBook, iMac or Mac Mini, you may have limited internal upgrade options.