Without your account password, others can't see your backup.
If the landlord is worried, you can use the pc version of the application treasure to back it up to the computer.
You can specify your own backup path and make a folder yourself.
Can be set to hide files or directly set the computer power-on password.
In this way, others can't see the backup of the landlord, and his backup function is also relatively powerful.
You can back up the contact SMS application in my mobile phone toolbox.
You can also export music video novels in corresponding locations, and you can also export contacts.
You can view it after exporting. I hope this will reassure the landlord.