are you able to upload anything to the SD card? It will only accept a Fat32 format, make sure its not NTSF.
Plug U220 into computer
Open Avic Feeds
Click on Applications, window should pop up asking to select memory device, click on sd card.
(see attached image), it should look like this (except the right side should show your sd card data)
Click on the check box's on the left of the applications, and click on the sd card. it should transfer over.
If this doesn't work, you might want to call pioneer...
good luck
Ohh yeah, you're not using a mac are you? I dont think