LaCie 6big Thunderbolt 3 Think Big — We’ve Got You Covered. With up to 84 TB of capacity on your desktop, up to 1,400 MB/s speeds, and RAID 5/6, the LaCie® 6big Thunderbolt 3 lets you rein in the stampede of data from 4K cameras. - Thunderbolt 3 (reads | writes in MB/s): 6big RAID 0: 1400 | 1400 6big RAID 5: 1200 | 1150 - USB 3.1 (reads | writes in MB/s): 6big RAID 0: 400 | 400 6big RAID 5: 350 | 350