LaCie 16TB 1big Thunderbolt 3 USB3.1 Dock External Hard Drive with CF and SD Card Slots DisplayPort Dual Thunderbolt 3 Ports The LaCie 1big Dock is a Thunderbolt 3 storage hub that lets you ingest files directly through built-in CF and SD card slots, connect two 4K displays, daisy chain devices via USB-C or USB 3.0 ports, and charge your laptop with up to 70W of poweróall through a single cable. Whatís more, it features an advanced-cooling design and a swappable, enterprise-class drive because what matters most? Extended reliability.