Glo Unable to use micro sd on Kobo Glo

Hello,

I own a kobo glo. I am desperalty trying to get it reading a micro sd card.

I turned of the device, added the card, turned the device on (several times). It keeps displaying only e-books on internal storage...

I tried several format (FAT32, FAT, exFAT) but no way to see the books in the library. The micro sd is 2gb only so it should be ok...

I downloaded a user manual but there is no mention of how to use properly micro sd Card...

Can someone help me ?

Many thanks in advance

Phil