Device name change

Phone setting (the gear)
storage device settings
change primary storage from device to SD card
most files can be move by clicking option in top corner
really hope this helps?

I found some useful formating instructions at http://osx.tribe.net. Note: FAT 16 only supports 2 GB or less. I had no problems reading FAT 16 formatted SD cards in Leopard. I revised the instructions a bit:
To format the SD card, you will need the path to the SD card device and the SD card device number.
1. Insert the SD Card into a card reader.
2. If you don't know how to find the device number of the SD Card, here is one way to do it:
2b. Open Disk Utility
2c. Highlight the SD Card device (upper icon), not the SD Card volume (lower icon)
2d. Click Erase at the top of the window
2e. Select Volume Format: MS-DOS (FAT) Click Erase... > Click Erase
The SD Card Volume Name will change to the UNIX device number e.g. "disk5s1". Note this number as it will change by itself to "Untitled". It is now formatted in MS-DOS FAT 32. We need to reformat it in FAT 16.

Once you have the device number of the SD Card, you need the path to the SD card device.
3. For my Mac, the path to devices is "/dev". In a terminal window: type "cd /dev" and hit the "Return" key to go to the "dev" directory. Then type "ls" (with a lower case L) and "Return" key. You should see the SD Card device number listed.

Formatting the SD Card in FAT 16:
4. In Disk Utility, highlight the SD Card device and click Unmount at the top, not Eject. The desktop icon of the SD card will disappear.
5. Go to the Terminal window. Be careful to type the following command with the correct letter case and spacing. Again, make sure you type the correct device number and path as you can very easily erase your hard drive in UNIX.
Type the command:
newfs_msdos -F 16 (path to SD Card device)/(SD Card device number)
e.g. newfs_msdos -F 16 /dev/disk5s1
and hit the "Return" key.
6. If you get just a new prompt (or a prompt with some warnings, e.g. below), the command executed successfully. You can remove the SD Card; it is now formatted in FAT 16. You can verify this in Disk Utility after mounting the SD Card.
If you get some instructions on the newfs_msdos command with a new prompt, the command did not execute. Make sure you enter the command with the correct case and spacing. Hint: to re-enter a previous command you typed, hit the up arrow repeatedly. For more information, type: "man newfs_msdos". Scroll with arrow keys. Type "q" to quit and return to prompt.

Did you rename the file extensions? On the unit, the map file and map unlock file must be named gmapprom.img and gmapprom.unl

On the SD card they must be named gmapsupp.img and gmapsupp.unl.

Also copy your garmindevice.xml file over to the SD card too.

1. Try to verify if the SD card is still working by plug it in on another known good source (example computer, camera... etc.)
2. If it not working you have to replace the card itself
3. If it is working on another source. try to go to device manager and uninstall / reinstall the drivers for SD card. by doing this right click on the SD driver itself and left click on uninstall. Right click on the "computer name" under device manager and then Click on "Scan for Hardware Changes"
4. If you have a cd for the sd card slot well and good
5. got to safe mode see if the SD card is detected on safe mode
6. Also you might want to scan the computer for any viruses

SD cards allow you to store digital information; you can use SD cards with most electronic devices like digital cameras and computers.
An SD card will become write protected if the switch on the card is placed on the "Lock" position. This prevents any information on the card from being altered or deleted.
If you wish to add, delete or change any of the information, you must remove the write protection.
Remove the SD card from the computer or digital device.
Locate a switch on the bottom or side of the SD card.
Move the switch to the "Unlocked" position to remove the write protection.
If you do not have a switch, you will need to remove the write protection with your computer.
Insert the SD card into your computer's card reader or back into the digital device.
You can now save and change information on the card.

It's the memory card. SD cards have a slide switch along one edge. The position farthest from the contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card, allowing the camera (or any other device) to write to the card.

SD cards allow you to store digital information; you can use SD cards with most electronic devices like digital cameras and computers.
An SD card will become write protected if the switch on the card is placed on the "Lock" position. This prevents any information on the card from being altered or deleted.
If you wish to add, delete or change any of the information, you must remove the write protection.
Remove the SD card from the computer or digital device.
Locate a switch on the bottom or side of the SD card.
Move the switch to the "Unlocked" position to remove the write protection.
If you do not have a switch, you will need to remove the write protection with your computer.
Insert the SD card into your computer's card reader or back into the digital device.
You can now save and change information on the card.

No. The differences between SD and SDHC goes beyond what firmware can change. It's possible to design a device to use both SD and SDHC cards, but a device that was only designed for SD cards cannot use SDHC cards without hardware changes.

If the memory card capacity exceeds that of the reader you will not have the card recognized.

You can use the HotSync process to install files directly to an SD card, rather than having install first to your devices internal memory then the SD card. 1. Insert an SD expansion card into device. 2. Launch the Install Tool on your desktop computer: from the Windows Start menu, choose Programs, then Palm or Handspring (dependin on your device), then Install Tool. 3. Make sure the correct user name is chosen from the pulldown menu at the top of the Install Tool window. 4. Drag and drop files from your hard drive into the Install Tool window. File types supported on all devices: * Palm OS applications (.prc) * Palm OS database (.pdb) Additional file types supported on certain devices: * MP3 music (.mp3) * Pictures (.jpg or .jpeg) Please refer to your device's documentation to learn how to use these additional file types on your device, if applicable. 5. In the Install Tool, click on the file. Then click on the "Change destination" button at the bottom of the Install Tool window. 6. Move the file to the column for the SD card. Click OK. 7. Perform a HotSync operation.