You can do this, after downloading the update, you go to the file manager and copy the internal memory the two files (zip and md5) to a folder on the microsd card!
This way, you choose the sdcard with the TWRP and the filers already appear to update you.
I had this rom but it only gave me problems!
I put the previous rom on my redmi note 7 with orange fox, and it always asks me for password when restarting, I tried to use fastboot and I can't, does anyone know how I can solve this problem?
Thanks!
I did the update and as has already been reported, the wifi passwords have disappeared and the pin also fails from time to time!
I also had problems with two apps, which I fixed by uninstalling and installing again
Redmi note 7 Lavander
You have the answer here
https://xiaomi.eu/community/threads/20-1-16-21-v3.54300/page-13#post-526743
https://xiaomi.eu/community/threads/20-1-16-21-v3.54300/page-14#post-526774
https://xiaomi.eu/community/threads/20-1-16-21-v3.54300/page-14#post-526775