I'm having trouble applying update from external storage topic

Hello, I'm currently facing a problem which I can't fix by my own or even know how to fix it of course.

When I boot into recovery mode and select "apply update from external storage" it doesn't show any type of files/folders. I can copy files and such and I can see it through "My Files" but not in recovery mode.

I use Samsung Galaxy Ace 2 (GT-I8160) Jelly Bean 4.1.2 (Official & Stock)