How to Put PS3 Games on External Hard Drive
You might need to jailbreak your PS3 to run games from an external drive. Google for guides, but be careful, as it can void warranties and risk your console's health.
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I did this by using multiman after jailbreaking my PS3. I copied my games onto a FAT32 formatted external hard drive and loaded them up from there. Just know there's some risk involved with jailbreaking.
You can't directly play PS3 games from an external hard drive, but you can back them up. Format your external HDD to FAT32, then go to Game Data Utility, find the game you want to back up, hit triangle, and select 'Copy'.
It's not officially supported by Sony to play PS3 games directly from an external hard drive. You can back up save data and game installs, though.
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