When i’ve updated WiiMC to 1.0.2, it seems that it stopped detecting my HDD.Its plugged to secod usb ports (not the one for usb loaders) and it worked fine under 1.0.1 (but using normal 202 ios not the wiimc one).
Before even you download and Install Wiimc try to to install IOS 202 first before you do anything else and then at the end install Wiimc 1.0.3 and see if something changes