2TB!

The exclamation mark is probably unwarranted as 2TB is neither new nor large these days, and the drives are pretty common. Refurb drive off Ebay for $80 inc shipping though! (That deserves the exclamation mark).

This will be purely for my summer job on a mountain. Probably didn't do much more than 800G of photographs last year, but fully expecting to double that this year. The 'problem' this year I that I have more days on the mountain, less distraction days (no events), a camera that takes more photographs (my poor old 400D reached it's buffer limit far too many times last year), and the photographs are 50% bigger this year.

So fully expecting to take 250,000 photos over the course of the summer.