Serious answers preferred as I am not rich and will not be putting it back into a bin and buying a new expensive model as too many 'seasoned' GS riders do... 

Earlier 2620s had mini hard drives that weren't suited to bike use as the vibrations/shock destroyed them after a while. I think that later models had Compact Flash cards like the 2610.
Not suited to bike use?

I have a 2720 which also has a mini drive
hated mine, sold it a few months after I got it,couldn't find anthing I wanted it to when on holiday in France ( you know, like bloody great hotels and the like) so was delighted to sell it on.
One of the problems with the 26** series and original Quest is that the postcode look-up is very limited to the point of being useless.

Hi
If I purchased the power/audo cable - Garmin power/audio lead (part 010-10495-02) where is the best place to tap the power from. Sorry for so many questions but there must be lots of users of the 26--- that have already found the best solution, Thanks in advance