If you want a good looking high capacity drive with the Apple MacBook, consider the LaCie Porsche Design USB-C Mobile Drive. You can connect the LaCie Porsche Design USB-C Mobile Drive directly to the MacBook using a USB Type-C to USB Type-C cable that comes with the drive. With the LaCie Porsche Design USB-C Mobile Drive, you get fast connectivity with USB 3.1 Gen 1 (5 Gb/s) link speeds and large storage capacity access of up to 4 TB.
Make sure you don't use the Apple USB-C Charge Cable (2m) that comes with the MacBook which only supports USB 2.0. Most USB Type-C to USB Type-C cables that come with chargers only support USB 2.0 speeds.
If you lose your cable, and need a replacement cable, try using a certified cable like this one from Belkin.