I cannot planify a trip with my computer on the account of my Tomtom premium

Hi
@PIERLOUIT
Welcome to the site....
Are you logged into MyDrive on the GO Premium....
Tap 4Dot (.... Menu) --> Setting --> MyDrive... Login with your Tomtom Email & Password....

Stay Safe... ATB YFM

Hi
@PIERLOUIT
Welcome to the site....
The NAV5 (Wi-Fi) devices normally update using Wi-Fi....
If Wi-Fi is not available or is slow/unstable/unreliable.....
See Option... (2) Connect over USB....

TomTom Video... Updating your navigation device using Wi-Fi



If you have successfully connected your device to your Wi-Fi....
To check your Connection Speed, Signal Strength & Quality
On the Device... Tap 4Dot (.... Menu) --> Settings --> Wi-Fi
Tap on Your WI-FI name (The one Showing as connected)
A new Menu Page opens


On the left-hand side of the screen is your Wi-Fi Connection Status

Tomtom recommends a minimum Wi-Fi download speed of 30Mbps
Tomtom NAV5 (Wi-Fi) devices will only connect to a 2.4GHz Wi-Fi network
All the update actions are executed on the device...
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Option... (1) Connected Wi-Fi


Updating the device....
Tap the 4Dot(.... Menu) --> Setting --> Updates & New Items

Extra Maps are Installed/Maintained....
Tap the 4Dot(.... Menu) --> Setting --> Maps

I always update my devices one Update at a time
The NavCore Application and QuickFixGPS updates are force ticked by Tomtom... Deselect any other updates like Maps, Speed Cams etc... Update the mandatory item/s first, when complete update the remaining items one at a time

Note... NAV(5 Wi-Fi) devices connected over Wi-Fi do not require MyDrive Connect to be running Even if MyDrive is running you have no access the MyDrive Connect menu structures as used by the previous NAV3 & 4 devices
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Option... (2) Connected USB
If Wi-Fi is not available or is slow/unstable/unreliable.....
Tomtom recommends a minimum Wi-Fi download speed of 30Mbps

Connecting hard-wired over USB is normally more reliable than any Over The Air Connections
Updating your new device over USB will require "MyDrive Connect"
Get it here..... https://help.tomtom.com/hc/en-gb/articles/360013959499-Installing-MyDrive-Connect

There's no need to login to MyDrive Connect... See Note... (1)
Connect your Device to a USB Port on your PC
The Update will hopefully complete

If you're using a Laptop it would be also more advisable to use a hard-wire connection back from the Laptop to the Router....
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Note... (1) MyDrive Connect will only show a "Splash screen" saying "Connect your device using Wi-Fi" etc....


If required you can close the 'Main Mydrive Window' showing the "Connect your device using Wi-Fi" Splash screen... MyDrive Connect only needs to run in the background on the PC Taskbar... The NAV(5 Wi-Fi) devices have no access the MyDrive Menu structures as used by the previous NAV3 & 4 devices
Updating a NAV5 (Wi-Fi) device using USB is the same as using Wi-Fi, all the update actions are executed on the device...
Tap the 4Dot (.... Menu) --> Setting --> Updates & New Items
Extra Maps are Installed/Maintained... Tap the 4Dot(.... Menu) --> Setting --> Maps

Stay Safe... ATB YFM