switching micro sd cards?

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http://androidforums.com – okay first off, sorry but i'm not so tech savvy so you'll probably get a bucket load of stupid questions from me. but i just got a samsung galaxy proclaim, i think, from straighttalk about a month ago. and it came with a 2g micro sd card. but i keep alot of pictures on my phones because computers aren't always available. i have a sd card thats 8g that i got for my old phone. my question is, how can i put the 8g card in without losing things on my phone? i figured i could just hook my phone up to the computer and copy all the folders that it has and then put the 8g card in the phone and pas (General)