I have two Thunderbolt 1 ports sitting on my 2011 iMac that are doing nothing for me. I want to make them useful. I could stick a Thunderbolt to Firewire dongle on there, but I already have a Firewire port and daisy chain the two external drives through it. I could use more USB ports, but the few adapters I've seen are (1) for Thunderbolt 2 or 3, and (2) Bloody Expensive ($76 for a thunderbolt to a single USB3 connector). Any suggestions where I can find reasonably priced thunderbolt -> USB devices? Any ideas on what I can do with those Thunderbolt ports? Thanks!