I usually put a 4G in the camera and take two 1G backups. I take some video, which uses tons of memory, and I'd actually be happier with 2G backups.
About erasing your cards--I learned that the hard way. I had just put in what I thought was an empty card to take some pictures and video of Spectromagic. After the second float, I got the dreaded "memory full" message and found that I hadn't erased the card from my trip six months before. You should definitely clear your cards as soon as they're uploaded to your computer
About erasing your cards--I learned that the hard way. I had just put in what I thought was an empty card to take some pictures and video of Spectromagic. After the second float, I got the dreaded "memory full" message and found that I hadn't erased the card from my trip six months before. You should definitely clear your cards as soon as they're uploaded to your computer
Luckily my mum had also been taking pictures - don't put yourself at a similar risk!