Quote Originally Posted by hayran View Post
Hi
I think when garmin creating these SD Cards, They are reading CID of SD card and writing somewhere in the files. May be it is encrypted.
Than One SD card inserted in the Audio CD 20, It should compare CID of the SD card and from the file where it is hidden.

So you need to know the CID of the SD card which its files shared here so you can search in the files. If you can find the place, It is possible to read CID of other SD cards with using this tool
Code:
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And Possibly everybody can use their own CID of SD cards and write in the place.

What do you think friends
If you discuss this previously and if this is a duplication I am sorry
Thanks for trying to assist, but that's not the answer unless someone wants to part with a Grand or more as mentioned in your link [please CODE outside links btw ]. From that link you provided:
I didn’t contact Nexcopy Incorporated for pricing of the equipment, but doing a quick search for the equipment shows me a price of about $1k for the smallest 20 target system and $3k for the largest, 60 target system.

With all this said, there is still no clear-cut method to read CID numbers off SD cards for the home-user, but maybe this article will at least explain why you haven’t found a good solution as of yet.
The most reliable way I know of is to use a device capable of reading the CID of the media card, most Garmin GPSs and [Only registered and activated users can see links. ] can do it as can other types of device. Some more info in [Only registered and activated users can see links. ] under SD&Sd id?. Cloning cards is another [unhappy] story.