I have been using the 533MC Pro for several months now with no issues. I have the 120mm mini plugged into the 533MC Pro usb hub and the 533 plugged into the ASIAir Pro via USB 3.0. I haven't had any issue until last night. The only way the AIR will recognize my 120mm mini is if I plug it straight into the AIR. I have tried to plug my EAF into the 533 and it isn't recognized unless plugged into the AIR. I have tried changing cable and rebooting but with no results. This arraingement, EAF, 120mm mini and 533MC Pro, leaves no open usb port for my usb stick. This creates an extra step in getting pictures to my PC. Any help would be appreciated, thank you.