Upgrade A5, A8 Pro, A10, A11, A13 to Android 7

[valkyrie]

Any idea what is the maximum internal HDD size i can use for Egreat A8 Pro? i remember i read before is 8TB and would like to confirm anyone using 10 or 12TB?

[wasdhsaas]

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