My Tom Tom One IQ Routes would not allow me to save anymore new itineraries as the maximum had been reached (206) so i deleted 10 that should have freed up some memory.

Unfortunately this did not work and so i made a backup to Home and a manual backup to my PC before I formatted the Tom Tom ready for a fresh installation.

I copied the saved folder containing everything (except itn folder) copied previously from the GPS back onto the internal drive but now when I switch on the unit the dreaded red cross in a circle flashes and Home shows no device connected, even though the drive is shown on my PC.

I have tried formatting the GPS again and coping just the ttsystem file and then adding the map folder (312 meta) but to no avail.

Can anyone give me some advice where i am going wrong and perhaps a link to a new working Navcore for my device to give me something else to try.