1. Download the desired GCD file from the Firmware page to the \RGN\ directory you created
2. Extract the GCD file from the downloaded .zip file
3. Delete the downloaded .zip file
4. Rename the GCD file to gupdate.gcd
5. Drag the gupdate.gcd file to RGN_Tool.exe
6. Verify the HWID displayed in the RGN_Tool window matches your GPSr HWID
• eTrex 30 HWID = 1305
7. In the RGN_Tool window, select 'File > Save to RGN' and save as gupdate.rgn in the \RGN\ directory you created
8. Delete the gupdate.gcd file from the \RGN\ directory you created
9. Close the RGN_Tool

Verify Progress

• The \RGN\ directory should now contain these files:


1. RGN_Tool.exe
2. Updater.exe
3. gupdate.rgn

Flash RGN

• Steps 5-8 must be completed before the GPSr enters Forced USB Mass Storage Mode.
• If this happens, restart the Flash RGN process.


1. Disconnect all GPSr from your computer
2. Drag the gupdate.rgn file to Updater.exe
3. After the Updater window appears, select the 'USB Device:' radio button
4. Power the eTrex 30 off (press and hold power button ~10 seconds to force power down if necessary)
5. Press and Hold the Thumb Stick in the Up position
6. Connect the eTrex 30 to your computer with a USB cable
7. Continue holding the Thumb Stick in the Up position
8. When the eTrex 30 appears in the 'USB Device:' window, select 'OK'
9. Continue holding the Thumb Stick in the Up position
10. When the eTrex 30 displays "Software Loading", release the Thumb Stick
11. The Updater will display a download progress bar
12. When the flash is complete, the updater will display a 'Successful Update' message
13. The eTrex 30 will restart with the new firmware version installed