Hi
The AT200 seems to be equipped with an micor USB port which support the OTG technology.
This allows you to connect the USB flash memory, and HID (keyboard and mouse).
This port complies with USB 2.0 standard.
To connect a USB device (USB flash memory, keyboard or mouse) you must use an OTG cable (USB On-The-Go). The cable must be certified as USB ON-THE-GO.
http://en.wikipedia.org/wiki/USB_On-The-Go
PS: this tablet does not support a printer and as far as I know the port operation of all USB devices has not been confirmed so some USB devices may not work properly.