Here the fake that ppl can lie all of u......
http://media.putfile.com/fake-psp-update-by-usb

i found out that we can't downgrade psp by using usb.........
when i read all the downgrade using usb all 52 pages..... i notice that most of ppl say that they cant do it....... and the person who post the first threat had show us the video the same like i made...... that mean he also it is the same thing like me.......... it is fake.........