I think that i clearly asked the question:
i have no files on my sd card please help with garmin files
I think compatible models are:

DNX9990HD DNX9210BT DNX7190HD DNX7490BT DNX7210BT DNX719VHD DNX7310BT DNX7310BTM DNX6190HD DNX6990HD DNX6490BT DNX5210BT DNX5510BT DNX5310BT DNX5310BTM DNX5190 DNX5060EX DNX4210BT DNX521DAB DNX4210DAB DNX4310DAB DNX649VBT DNX521VBT DNX531VBT DNX531VBTM

regards