i accidentilly deleted my cod waw data which allows me to play the zombie mode, ive been trying to do this for a while but nothing works, ive tried 3 different usbs, ive formatted them all to fat32 and done the folders PS3/SAVEDATA

downloaded the file unzipped it using winace extracted it to the usb, it shows up on my pc but then when i plug it to the ps3 the usb shows up but no files, ive tried to find how to do the triangle/show all but nothing comes up, when i press triangle all that coems up is information, i go into it and it says no saved data? no other options....