Cannot detect external SD card
I'm having trouble with my Kobo Touch detecting my external SD card. Namely, it just won't detect! I can upload books from Calibre into my SD card just fine and it exists there (I double checked using Finder) and when I eject, unplug, etc no books are detected at all! I have tried putting the books into my main memory instead and the Kobo detects that no problem but once I move those books over to my external... NO LUCK!!! I just don't understand what I'm doing wrong. I have tried restarting, factory reset, etc but it's just not working out. Any ideas would be appreciated!
Running Kobo 1.9.9.