Dual drive professional hardware RAID Mercury Elite Pro Dual is the perfect Thunderbolt and USB 3.0 RAID solution for creative workflows, project archives, and system backups. Inside each Mercury Elite Pro Dual are two drives, easily configured in RAID 0, 1, span, or independent mode. Thunderbolt technology unleashes the full potential of two 3.5-inch hard drives in the Mercury Elite Pro Dual. In RAID 0 you'll experience the maximum sustained throughput from your drives with speeds up to 442MB/s, fast enough to support compressed 4K workflows. Configure the Mercury Elite Pro Dual in RAID 1 mode and enjoy instant mirroring of your data. Experience the freedom to create without wait or worry.