How many tracks (map variety) can 550 store?

[RegH]

I will be away for ~1month without laptop access and would like to have access to all the tracks when I get back as a record where I have been.

My 550 currently has a 2GB card in. Can I store them on that (before I fill it with .mp3s)

Apologies, bit of a moron with this stuff.

Reg