yea, and no u dont need another, those files u need to copy act as save files so even if u delete fgo on same phone , as long as u replace the files with those u "copied" u can use ur desired acc
the only warning is not open same acc on diff devices at the same time, 100% ban
So correct me if my step was wrong after i read the thread:
1. copy the required file to other location, and rename the fgo in android/data to other name?
and uninstall the modded fgo apk
2. download the original apk and instal it, then rename back the fgo in the android/data.
3. okay for last step i bit confused here.
open the game and close it then copy paste the file to android/data/com.aniplex...../data and open the game again?
or after installing the original and renaming back the fgo data, first paste the req file we copy early to android/data/com.aniplex..../data and replace it then open the game?