Backup? first , why not use the android transfer software to transfer android data to computer, it can easily backup your phone data on the computer ,even if you lost the phone data by mistake or accident, you 'll be able to restore the deleted or lost phone data from previous backups, the most...
Recover deleted files from android is not difficult , the key is that which recovery software you choose ,as well know ,en effective way for users to recover deleted phone data is very important ,i personal suggest you can try Android Rescuer to get them back ,
As for me , i wan to full or security recover deleted phone data from android , i need to use the effective software to solve this problems, because of the general software can't satisfy our requirement ,it will cause a lot of trouble to we telephone,
In my opinion ,you can try this phone data recovery software, whether they want to recover deleted messages or recover lost photo from android , it still help you get them back for a more security way,