ttsystem

[fptrainer]

received error message : can not create E:\ttsystem when I attempted to update my TomTom One.,

 

[dhn]

Does your device have a SD card installed?

 

[canderson]

I'd back up one further and find out which of the several ONE units we're talking about.. I count 9 different 'breeds' of a ONE. Two have ONLY an SD card (no internal memory) while others either do or don't have a slot for one.

To the OP --
Can you tell us the first 2 digits of the serial number of your unit?