Hello & Welcome to Just Answer,
Sorry to hear of any issue you are having with your device.
To help you with this issue, may I ask:
1) The FULL Model Number of the device you are working with? If it is "a big Garmin", you may have to remove any mount from the device and look for the model on the back (under any mount plate).
2) The AGE of the device?
3) WHAT are you trying to download to your computer?
4) What TYPE of computer are you using, and what is the EXACT message(s) you see when you try to download?
Please use the REPLY box below.
I see it has been a few days and I haven't seen a response on this page, so I just wanted to follow up to see if you have any more questions concerning this issue OR if the issue was resolved?
I look forward to any further questions or results that you may have.
Thanks, ***** *****--. .-(im)