The last two times I upgraded, I used the app FlashFire, and it was a very simple process. So simple I figured I didn’t need to write it down. But by the time I needed to upgrade most recently, I forgot how simple it was, and I ended up down a rabbit hole pursuing a full backup before upgrading.
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I have a Nexus 6P running Android 7.1.1, but I am a few updates behind. I haven’t gotten the process down for updating since my phone is rooted and I am wary of losing data, so I tend to delay. I almost documented what I did last time, but it turned out to be simpler than I expected and I neglected to save the instructions. Now I sat down to do it again, but figured I would first try to understand how to fully back up and restore the phone at more of a disk image level. It didn’t end as well as I hoped, and this entry serves more as a log of what I did than as a guide for anyone else.
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