Sorry, I missed this! Based on the 'micro USB' part, if you have a Tiny TV DIY Kit or Video Player Kit with TinyScreen+, we haven't been able to get that working due to how little memory the microcontroller has.
I don't know your application but I assume you have some port for power/charging- Maybe a short micro USB extension or microSD card extension or both could allow you to access the microSD card?
Thanks,
Ben