My navman s30 has a picture of a computerrunning a link to a USB

You have to use the Navdesk software on your computer to load maps into Navman gps unit.

Google Navman support and go the link.

• Turn the Navman off by holding the power button in the upper left corner of the device until the screen goes blank.
  
• Plug the unit into its charger using the USB port on the bottom of the unit. The battery indicator light next to the power switch should turn orange, indicating that the device is charging. Once the light has turned green the charge is complete. If the light does not turn on, verify that the car charger is plugged into a working outlet.
  

Navman s30 uk map update

http://www.navman.com/in-car/North-America/USA/Customer-Support/6296/

The second option should allow you to download the update and then you will have to follow the instructions and connect your gps to the computer via usb cable.

Download the Navman S30 update click HERE! and save it on your desktop .
Also download the Navman S30 manual click HERE! -->page 96 for instructions .

I have provided a link to the "Navman" mapping page for your model S30.

http://www.navmanstores.com.au/2009%20Mapping/S-Series.htm

This is for online purchase, please read the "Important Notice" on the page for your maps, it advises what you need to have with you to install and activate your new maps.

Kind regards

Forget it. I have had the same problem with a S80 and Navman does not give a damn.
I cannot even load the maps I paid for.
Lost my money. Never again.

Open your usb cable with a sharp knife; you'll find four different coloured cables inside: leave the red and black cable intact; cut the other two. Close your cable with some tape.
Your navman won't go into usb mode again, but it will charge your device

Get the disk that came with it and load NavDesk on your computer delete the maps on your Navman and then reload them. This fixed the problem for me.

navman f10 will not link to satilite?