Depending on what the tablet maker implemented you're never sure of all drives to work. If the maker can't speak to you about this, it's a sign you may want to return it.
But I have a question. Are you trying to use a tablet in the place of a laptop?
I purchased a 7 inch tablet ,that supports micro sd ,and usb.I have enabled scanning of both on my tablet.Although the micro card works fine, the tablet only recognizes some, usb thumb drive.Also would like to know,do tablets support usb external hard drives.
Tablet model LY-F2S