Sonnet USB/Firewire Adapter Components FW8USB3A-E USB 3.0 and fire wire 800 ports - add SuperSpeed USB 3.0 and fire wire 800 ports to your Mac Pro with PCIe slots, Windows PC, or thunderbolt-to-pcie expansion chassis Wide USB 3.0 support & compatibility - USB 3.0 ports support storage, hubs, and other USB 3.0 devices; compatible with USB 2.0 devices Supports hot-swappable device connection - Plug in and disconnect peripherals without shutting off your computer Powered ports - support bus-powered drives (1a per USB 3.0 port, 1a per fire wire port) Optimized for Thunderbolt - provides maximum performance over Thunderbolt