Can somebody link me a USB that works for upgrading to android 7? I tried every USB I have in my house with no luck: 2/4/8 GB USB 2.0, even old ones, but none of them worked and gave me 30% error. I even tried many fws: 3.6.9, 3.8.0, etc. Any tip would be really helpful. I'd be very grateful, if somebody could link a working USB. Thank you in advance