Perhaps a dumb question, but did it come with any drivers?
Though that doesn't necessarily solve your recognition problem...
Some people suggest that your cable is crap, bad wiring or something. Perhaps try another mini-USB cable?
I found something on a different device that had similar problems:
Thank you for contacting Magellan.
This email is in response to your
query about the Explorist 210.
I understand that you are having
difficulties in getting the unit
detected on your computer.
Before you start doing these steps
please check with the operating system
in your PC. Because only WINDOWS XP,
2000 would be compatible with
Magellan. MACINTOSH would not be
compatible with Magellan.
Connect the USB cable to the Explorist unit in such a way that the
USB cable is pointing downwards
towards the battery case.
Make sure that the unit is put up in the file transfer mode. After
connecting the USB cable to the unit
press menu and press enter in the file
Make sure that you have connected the USB cable to the rear port and not
to the front port of the PC. Then your
unit would be detected as a new
hardware under "Removable disk E:\ or
G:\ or F:\"
If you have any external devices like web cam or printer connected to
the USB port please remove them.
Also if you have any firewall or antivirus enabled in your PC please go
ahead and disable them. Then restart
Then remove the USB cable from your unit and power off the unit and then
connect the USB cable and then power
on the unit.
If the issue still persists, and If
you could not install the CD then I
would suggest you to please give a
call to the technical support
department number 1-800-707-9971 so
that we would walk you through the
trouble shooting steps to fix this
If you have further queries, please
get back to us.
You can also contact our Technical
Support at 1-800-707-9971 for further
Regards, Steve Magellan Email