yes
I only see usb/sd mod. There is no usb mode.
sd card. Curiously, the mario party 8 I put in the sd card ran even though I didn't use the WiiBackupManager.
When I put my games in usb, they didn't show up in wiiflow. When I put the game in the SD card, it shows up, but other than mario party 8, I got a DSI error or went back to the wii menu and the game didn't run.
I tried putting the game on USB before putting it on SD card, but the game didn't show up in wifi flow. And I just see that Mario Party 8 runs on SD card. Other games still won't run.