Default [Q] CF Card Reader mount point?

Hi Everybody,

today I tried to attach my Transcend USB Card Reader (TS-RDF8K) to my Z2 via the working USB OTG adapter. I verified the correct function of the OTG cable by connecting a Logitech keyboard and mouse and this worked perfectly. Now I wanted to try reading from the memory cards of my camera which uses Compact Flash cards. Sadly I could not find a mount point in ES File Explorer to access the CF card. Maybe someone can enlighten me how to access the card.

Thanks in advance