make sure it is named correctly and in proper folders. make sure you are use the right (not left) usb slot.guys my usb with cfw 4.87 " no applicable update data was found" ps3 can you help me?
do NOT use a usb hub.
if all else fails, sometimes this trick works: right after pressing x to search for the update file, unplug the controller from usb. leave it unplugged until it finds update or fails to find it. then plug controller back in. (this is rare but has been reported by a few users)

