Disgaea 4 [BLUS30727]

Is this what you need ?

You put a disc game in the hard drive folder. Don't do that. Put it anywhere else, like on your desktop or whatever, and use the boot --> boot game menu.

Also no files are found because the directory structure is messed up. As on the original disc the structure must be like BLUS30727\PS3_GAME\USRDIR\. That is everything inside the folder PS3_GAME *except* the file PS3_DISC.SFB which must be next to the folder PS3_GAME, not inside it or anywhere else. Move things around as necessary.