Maybe 4GB
I got an 8GB for 8 bucks over 2 years ago.
I have a 16gb SD card for my camerayealll jelly
As soon as you're done taking pictures/video it all goes onto your computer anyways.I've gone on just fine with my 2GB/4GB SD cards.
Thing that sucks is that an hour of 1080p video is about 4GB.