There are reasons why there are always a lot of people miss the old fastboot more vs TWRP, and ask help for TWRP, everyweek.
You will not get help. The only thing they do is ask you to read previous blogs and solve it by yourself.
I guess they can not realize that people ask questions just after they tried many times accroding to these blogs, but still failed.
Problems with TWRP_recorvery method:
1. when change to TWRP from fastboot, you have to format your device and clear data
2. even you backup, not all the data can come back. These will be lost, such as 1) login of some app(almost all apps), 2) message recording of some app (wechat, line, etc)
3. for some devices, TWRP come out after 1 year you have use your device. It means you will lose a lot of data.
4. They are always saying the convinience of TWRP. But actually as a third party tool, TWRP itself is inconvinient enough.
5. You can see people complaining failure with TWRP, every week! And they will not get help in this forum. They get scorn and ridicule--why dont you learn by yourself.
6. The real OTA is not to via such a thrid party tool. Maybe andorid people should learn from apple. Beta version of IOS is so easy to install, no tool, no formating data. Pure and real OTA. From stable version to beta, from beta to stable version, freely and no data lost!
For me, I tried TWRP method, but it is too late until I learned the lessons. I did everything accroding to previous blogs. But still, I failed with TWRP, and I lost all my message recordings of social apps, including some precious ones. They will not come back from so-called backup.