Cómo actualizo mi TomTom

Tengo un TomTom ONE 3rd Edition, 1GB. ¿Cómo instalo mapas de Europa si pesan más de un GB?

[TomTomGo]
DeviceName=TomTom ONE
DeviceVersionHW=ONE (v6)
DeviceSerialNumber=Y7
DeviceUniqueID=
RamDiskVersion=20080825
BootLoaderVersion=55022
LinuxVersion=223986
ApplicationVersionVersionNumber=8016
ApplicationVersion=9380
UserLanguage=Español
UserName=
LastConnectionTime=Never
GPSFirmwareVersion=
BuiltInColorScheme0=Belgica
BuiltInColorScheme1=Brittanica
BuiltInColorScheme2=America
BuiltInColorScheme3=Germanica
BuiltInColorScheme4=Australia
BuiltInColorScheme5=Deuteranopia
BuiltInColorScheme6=Greys
BuiltInColorScheme7=Antarctica
BuiltInColorScheme8=Africa
BuiltInColorScheme9=Astra
CurrentColorSchemeBuiltIn=0
CurrentVoiceInfo=Marta
CurrentMap=Iberia
CurrentMapVersion=815.2024
CurrentHomeLocation=
Traffic=N
CurrentFuelpricesType=
CurrentFuelpricesTypeString=
CurrentFuelpricesLastFullUpdate=
ValueRatio=BoK43lgryfOQ3VBvbQ==
Features=PlusDownloadDynamic,PlusDownloadGeneral,PlusDownloadMap,PlusDownloadPOI,PlusDownloadScheme,PlusDownloadUpgrade,PlusDownloadVoice,PlusDownloadRingTone,PlusMessageNotification,PlusPushChannel,PlusTraffic,PlusWeather,PlusEphemeris,PlusBuddies,PlusMobileSafetyCameras,PlusRoadConditions,PlusFixedSafetyCameras,PlusFuelPrices,HDTraffic,PlusOnlineCamera,PlusTripReporting,HomeBackup,Newyork,Newyork1Dot6,Caymann,Durham,CarSymbol,RDSTMC,Prague,SDSlot,InternalFlash
SupportedPatchTypes=1F
NrSupportedErrorTypes=132
UserPatchDatVersion=102
CompressedPatchVersion=150
MapServerPatchDatVersion=104
DeletedPoiDatVersion=200
ServerLineIndexDatVersion=102
ServerNameIndexDatVersion=102
MapShareSupportedProviders=203
CharacterSet=Latin-1