sounds like your memory stick just failed. It happens, and probably has nothing to do with retropie or the raspberry pi. just coincidence.

@herb_fargus Thanks for all your work. Everything was working before I update the script and everything. Maybe you could look into it some times? the USB feature is so great, especially with all the ISOs for the systems.

Maybe something must have broken the feature. It was working with the plain 4.2 image. (though, I had some issues at the boot up which said that it could not mount my hdd but it still showed all roms and mounted it properly).

Yeah, i got it working with an image of Retropie, but not with radbian.
Thanks for helping

@BuZz I understand....I was just in a hurry to get up and running...and with the info I received....my issues was resolved...

Thanks for your reply. I want to update the topic; I couldn't follow the link because I couldn't get F4 work as told in the guide (I think because of my keyboard). But I tried another joypad which is identical and that worked just well, really weird.

And I wanna ask another question;
Since raspberry is getting warm I have ordered heat sink with a fan (link is below) but it says running current is 0.2a and I guess that I cannot feed it from directly raspberry pi 3 (for which I have 2.5a adapter), or can I?

http://www.dx.com/nl/p/copper-aluminium-heatsink-fan-cooling-kit-for-raspberry-pi-black-443690#.WBspOPrhBIA