You can check to see if you have the same problem: I bought a brand new C330 from Amazon on July 2006. The unit works very well when i´m in the us using the preloaded maps.

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The problem is that the unit seens to be not recognizing any SD card inserted on it. Just bought from Amazon 7 days ago a fresh copy of Mapsource European navigator version 8 DVD, unlocked the product with success, used a card reader to program the card (it´s impossible to use the unit to tranfer the maps to the SD card) and nothing happens.

I´m going to europe, i spent a lot of money and nothing happens. There are no information at all at garmin´s web site on how to use a diferent mapset in the unit´s sd card slot, in the product manual, nothing. I have the lastest firmware version installed (5.30). Mediapreviewsetup 64 1 2 2 169 Msi Stone here.

Using the diagnostic screen i can see that the unit is not detecting the SD card ('no card inserted'). Tried to use different card size, tried to transfer just a few maps, tried to format again the card but nothing happens.

I was in NYC this monday and inserted the card preprogramed with the map of Lyon (France) on a Best Buy´s c330 display unit and also a Nuvi. They both startup with the message 'cannot unlock maps'. Of course they can´t because i unlocked the mapsource software to my gps serial number. But this message shows that these units are working well. When i entered the diagnostic page in the Best Buy unit it does recgonize the SD card (size, etc, etc.). I saw on the internet people talking about problems to load POI´s to C330 SD cards.

I´m starting to figure out that Garmin sold many many units with defective SD card interface or firmware or just the slot but no hardware interface at all. It seen an absurd to me, it seens unbelivable. Does anybody know something about this issue? Frequently Asked Questions •. I've experienced the same problem with loading POI's to an SD card. I tried to call Garmin once, but the CS rep I talked to had to read the instructions for POI Loader for the first time.

He didn't even know you could use an SD card! He attempted to transfer me to a technician and I was told the wait time was 20 minutes.

I was calling from work, so I didn't have time/patience to wait. Unfortunately, Garmin's customer service line is only open Monday through Friday, which is when most people work. Here's the info from their website: Technical Support (for all Garmin products except Apollo aircraft) - Monday — Friday - 8 a.m. Central time (closed holidays) - 1-800-800-1020 - 1-888-442-7646 or - (913) 397-8200 I just emailed their tech support with this issue (not recognizing POI's and map updates on the SD card). The website said it could take up to 7 days to receive a reply. I'll post the reply here as soon as I receive it.

If anyone has time to call them during regular business hours and receives a response, I would love to hear what they say. Thanks, Ross. I didn't know you could go to a diagnostics screen. The 'Data Card Test Page' does show a card there. It gives me the size and serial number. So it does look like its detecting the card. I don't know what the Checksum test is, but it says 'fail' on the results.

Thanks for the info. I don't have another card available at the momment, but I will try another card soon.

It is unfortunate that the Garmin website does not offer any help with these problems. I hope that they respond to my email soon. I would encourage you to call and/or email their tech support as well. I'll keep you informed if I learn anything. Thanks again, Ross. I just received the response back from Garmin: 'Ross, Per your email the stp c330 will only allow POI's to be loaded to the unit itself.

This is also true with the mapping updates these should be run directly to the unit. The SD card slot is for additional mapping such as Europe maps.' So this confirms that the c330 cannot use POI's loaded on SD cards.

As far as the Europe maps, the SD card should work. You should probably get in touch with Garmin/Amazon and have your unit repaired.

I hope you will have enough time to get it repaired or replaced before your Europe trip. Trust me, a GPS is very handy in Europe. The unit we had in our rental car was a lifesaver when we visited Scotland recently. Thanks, Ross.

I just got this back from the horses mouth about our problem with the SD card. With my SD slot on the C330, I am going to put some tape over it so the bugs will not enter. The only use I can see for this slot is to store the new cards people bought and can't use in this device. Thanks Garmin for the slot. POI-Factory for all the information you could get about its use.