Ok, I have my 2610 which at present has a 256mb flash card. If I want / need to store all of the UK + Europe on ONE FLASH CARD, just how big does it need to be?
Depends what version of the mapping software you're running and if you want route calculation or not. Earlier versions are smaller than the later ones.
City Navigator V.8 = 216 maps, 1809.5Mb incl route calculation data, 1188.6Mb without
City Navigator V.9 = 600 maps, 2214.1Mb incl route calcualtion data, 1430.9Mb without
just get yourself a 2Gb card from www.7dayshop.co.uk for £11.99 (kingston Memory) and you will have enough room for all your needs, including your waypoints