I had the same issues when trying to load new maps on my GO 720 which I use on the bike, this write up explains how to get then on. Its a bit long winded but worked when I tried it:-
I have been trying to install the new maps, but they are too large. Finally got a solution from Tomtom support that worked!!!!! I now have the new map, and space to spare on the standard memory!!!!!
This is the solution:
Please note that your device have 2 GB of internal memory and the issue you are experiencing is linked to the released latest maps size. This is not affected by your device, rather by software mistake in map release. I can assume that this issue will be resolved in next map updates release.
At the moment I suggest to follow below steps to resolve installing your latest map.
When downloading a new map, we highly recommend that you connect directly to the Internet with a network cable and not use a wireless network connection. Wireless connections occasionally drop the connection, which means that your map may not download correctly. Please note that you will need a stable and unrestricted broadband connection. If you are at the end of an exchange, you may experience an unstable connection, which can interfere with the map download.
STEP 1 Create a Manual backup of your TomTom device
- Charge your unit for at least two hours (preferably via the home charger)
- Perform a reset on your device (see: TomTom, portable GPS car navigation systems - Support home - Select your product)
- Make a manual backup as shown on TomTom, portable GPS car navigation systems - Support home - Select your product (Please scroll to the bottom of the page to make a manual back up)
IMPORTANT: We advise you to follow the next steps ONLY if you have made a successful backup of your device.
STEP 2 Format your device
- Open My Computer; you will see the TomTom device as a removable disk drive.
- Right click on the TomTom device drive and choose 'Format' (Please make sure quick format is not selected)
After the Format has completed, please disconnect your TomTom device from your computer.
It will now have a red cross on the screen.
STEP 3 Open TomTom HOME
- Log in to your account with your email address and password for your TomTom account.
- On Page 2 of TomTom HOME, click on ‘Manage My TomTom -> Items on Computer’
- Tick the option for ‘Applications’
- Tick the option for ‘Voices’
- Click on ‘Remove Selected Items’
STEP 4 Install the Map only.
- Go back into main menu - page one
- Click on Update my GO
- Please tick only the map to be installed when updating device (nothing else yet)
- Click on Update and Install
- Once it's complete, click on Done
- Disconnect the device by clicking on the Blue Eject button in the bottom right
Once installed, we will need to remove some files from the device.
- Go into Start -> Computer
- Open My Computer; you will see the TomTom device as a removable disk drive.
- Double-click to open the TomTom drive and locate your map folder- this will be named after the map you have downloaded, e.g. Western Europe etc. Double-click to open the folder
- In this folder, there are several files named cspeech_XXX.dat where XXX represents the country.
- Please delete all cspeech files except cspeech_GBR.dat which you will need to keep.
After above is complete
STEP 5 Install the Application + voices + all other items
- Reset your TomTom device as shown on TomTom, portable GPS car navigation systems - Support home - Select your product
- Connect it to your computer and THEN turn it on
- HOME will now search for updates automatically. If not please click on “Update my Device”
- A list of updates should appear
- If there is a TomTom application + voices etc .. please ensure those are ticked
- Click on 'Update and Install'
- Once complete click on Done and your device should reboot itself
- Once it connects again it will look for more updates
- When you have a new list of updates please click on Back
- Disconnect the device by clicking on the Blue Eject button in the bottom right
Your TomTom device should now be up and running with your new map installed.
If you get stuck on this email or you have any further questions, please let me know and I will be more than happy to help you further.
With Kind Regards
Standa
The TomTom Customer Care Team