Important:
Your Samsung Device Must Support "OTG"
"OTG" (USB On-The-Go) function must be switched "ON or ACTIVE", on your device.
For some specific devices, please turn on "OTG" (USB On-The-Go) function to allow the usage of the adaptor. This will be normally in the "Setting" section of your device. Please make sure you allow USB function, or your device is compatible with OTG function, otherwise the adaptor could not be recognised.
Please also note, this adaptor is not compatible or recognised by Apple products.