File structure for the USB should look like this: E:\PS3\EXPORT\PSV\ (E:\ is just an example and the CAPS are needed)

The ps3 looks in this folder for any ps2 save games, a compatible save game should look something like this

(BESLES-531556D69746368.PSV)

If it is another format such as max drive/action replay it will need to be converted, i can't do that but maybe someone else can, or you can buy an adapter for the ps3 so you can use ps2 memory card with it.

If you want to copy ps3 save games the directory is: E:\PS3\SAVEDATA the ps3 save files are in folders and you will need the whole folder to be copied to this directory for it to work.

Hope this helps, it frustrating i know i had the same problems. some files on the internet just dont work though so dont waste too much time if a file doesnt work lol