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Use official Android Backup for Android 6.0
The backup to Google Drive and Dropbox is nice, but I think that a backup using the Auto Sync API introduced with Android 6.0 would be the easiest way to go about backups from now on.
Сервис поддержки клиентов работает на платформе UserEcho
As far as I know, a special designed android file backup app could transfer everything from your phone to computer, and you don't need to root your phone, just need enable usb debugging on your phone.