The best high capacity external drive for your Mac or PC
Capacity: 4TB - 20TB | Interface: USB-C (Gen 1)
+ Huge amounts of space
+ Integrated USB hub
- Limited performance compared with Thunderbolt drives
If you're looking for the absolute largest capacity external USB hard drive, then the WD My Book Duo Is the one to get, as it now goes all the way to 20TB.
If you don't mind sacrificing some of the ample storage space you can set the drives up in a RAID 1 array, so you have file backups of your files should one of the drives die. This is an excellent feature if you're going to use this device to back up irreplaceable data, such as your creative work, as it adds a level of protection in case things go wrong.
It provides two additional USB ports on the rear, so you can easily insert flash sticks. The device, which comes with two-year warranty, has 256-bit AES hardware encryption, and automatic backup software (WD SmartWare Pro).
It's also worth noting that the enclosure used is fully serviceable and that WD ships the drive already pre-formatted for Windows users (NTFS), so you'll want to reformat it to work with your Mac