[andrew15]

I just went through this buying some micro SD cards for my contour+ camera for track use.
Some things I took away from the experience were:

1) Buy a brand name card from a well known retail store - there are a lot of fakes and counterfits out there and they are not of the highest quality.

2) The higher classes are usually required for HD video recording - if you are planning on something like this, check your video camera requirements before buying the cards.

3) back everything up - get an external hard drive if required. Even the best cards are usually a thin plastic chell and can be easily damaged

Good luck!
Andrew M