Can I backup saved Minecraft games/worlds on PS3?

I need to uninstall and reinstall Minecraft on the PS3 do to corruption of Minecraft files. Can I use a flash drive to save Minecraft games/worlds BEFORE I uninstall the game? It's for my kids and I would hate to see them have to start from scratch all over again. They've put HOURS into this game.

If I can do that, can someone instruct me on how to to do it or post a link with instructions?

Yes you can just back it up to a flash drive. Once re-installed just move back the worlds.

Video Tutorial: http://www.minecraftbuildinginc.com/how-to-backup-worlds-on-ps3/

Yes you can