I recently bought kobo vox, and I wanted to add some ebooks to my SD card. I put the micro SD card in the slot. Then I started calibre program, and connected the ereader to my computer. I followed the direction to connect the usb ( as mentioned on the screen). The problem is it only mentions the ereader is connected, it doesn't' mention anything about the SD card. I tried numerous times, but I still get the same result. Am I doing something wrong? Someone please advise how to make it work so I'll able to add my books to the SD card. Thanks!