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How to view the internal serial number on your plotter card

Sometimes, you may be asked to provide the internal serial number file (nTag.txt) from your Navionics card for troubleshooting or technical support. This situation may arise if you only have the microSD card/have misplaced the SD sleeve. In order to do this you will need to set your computer to Show Hidden Files. Insert the card into your PC, and follow the steps below depending on the operating system of your computer.

Windows 7

1.  Open File Explorer
2.  Click the Organize button under the left side of your menu bar
3.  Click Folder and Search Options
4.  Click the View tab
5.  Under Advanced settings, click Show hidden files and folders, and then click OK

Windows 8 or 10

1.  Open the File Explorer
2.  Click the View tab
3.  Under the Show/Hide section, select the check box by Hidden Items

Mac OSX (any)

1.  Click Spotlight search (maginifying glass) in upper right
2.  Type in Terminal
3.  Open Terminal 
4.  Type or copy/paste the following:  defaults write.com.apple.finder AppleShowAllFiles YES
5.  Press Enter
6.  Hold down the Option button and click on the Finder icon
7.  Select Relaunch
The ntag.txt file should now be displayed on your card as a file that is slightly transparent compared to the other items on the card. 

Mac OSX 10.12 or higher

Use the super simple shortcut key (SHIFT+CMD+.)
 

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