if you're refering to me, my sd card is a 16 Gb micro SD card, and I have copied my ropbin renamed to ''menuhax_manager_input_payload.bin'' and a copy of it renamed to ''menuhaxmanager_input_payload.bin'' at these folders:
SDCard:/
SDCard:/menuhax
SDCard:/3ds
SDCard:/3ds/menuhax
SDCard/3ds/menuhax_manager
and it still tries to download from internet, completely ignoring my SDCard
Hmmm.. try using the otherapp.bin also from smea's site. This guide is basically just 3 guides I found in 1, and I couldn't test the menuhax part yet. If that doesn't work either , then I'm sorry. I need to edit the guide depending on your answer xd