Just get a large capacity USB flash drive, el cheapo will do as long as you have a backup on your main pc/laptop. You can get an 8gb drive from dabs for less than a tenner. No need to worry about taking it out the car when you park so no theft loss issues. Its what I use and it works fine. Suppose I should load the files onto the NAV HDD and dispense with the stick altogether, just been too lazy to do it.
Taken delivery : Silver, DSG, NAV, Black Leather, Park Sensors, Winter pack.
Mods: Full Milltek, KW lowering springs,Wheel Spacers, Remapped to 258BHP, 405Nm