In an attempt to get access to content on my old MiniDV cam tapes, I attempted this long shot of an adapter hell... It's a Firewire 400 cable, to a Firewire 800
CJP-Geek 6ft USB 2.0 Cable For AKiTio Taurus FireWire 800 3.5 Dual Bay - Walmart.com
X260 2.5 inch FIREWIRE 800/USB 3.0| Alibaba.com
Macally 2.5" USB 3.0 / FireWire 800 Aluminum Hard PHR-S250U3B
Quick Tip: Tethering with a FireWire Digital Back to USB or Thunderbolt | Tether Tools
Rocstor LANCER LX Ruggedized USB 3.0/FireWire 800 Mobile Drives, (DISCONTINUED)