The LaCie 2big Dock Thunderbolt 3 20TB is an external storage device for Apple Mac users. Thanks to the 2 separate Thunderbolt 3 ports, a USB-C port, and a regular USB-A port, you can connect the device to any generation of Apple Macs. If something goes wrong with your hard drive within 5 years, Seagate Rescue Service will repair it for you. That way, you won't lose precious photos and files. The 2big Dock has a memory card slot in the front, which you can use to instantly store photos from your camera on the external device. You can also use the storage device as a docking station. Connect your Mac and instantly supply your dock with power, or place a USB flash drive in the LaCie 2big Dock and open it directly on your Mac. You can also send a 4K video signal via your LaCie to your screen, thanks to the integrated DisplayPort connection. Run the 2 separate 3.5-inch hard drives in a RAID array for extra-safe storage of your files.