Hello, I have long wanted to write about it. My phone (Pro 5) has update 5.1.6.0, 6/24/2016, but I still can not install it. When I try to install this update a message appears: Firmware Corrupt. There are options - try again update and / or delete data. I certainly don't want to lose my data.

How to solve this problem?

I attach screenshot (not good quality, its my webcam).