The truth is that it is not at all clear to me, because in addition to so many technicalities, I have to use the translator from English to my language.
Anyway it works fine for me to copy the database to /Download with the WRITE_EXTERNAL_STORAGE permission, when it should not work, in theory. This makes it more complicated to understand what it says.
Also, I really don't understand why they have removed all the sqlite database management applications in one go, for us (developers) it is an essential utility.
I would understand that for a normal user access is limited, but there should always be an option in Android "Settings" to allow access to databases.
Anyway, it is what it is.
Thanks, friends.