GAMES WON'T WORK

Ummh can someone plz help me?I'm having trouble when i download a game for example cooking guide i save it and
then when im finished downloading it. The file which is abode says "it wasn't properly decoded and stuff.(an error)

Hey, you aren't trying to play games straight after downloading are you without unpacking? I presume you have used Winrar to unpack it before copying it to your memory card!

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