when i make arestore to my mobile sony z2 nd enter my google account it start to download applications i installed along time ago is there away to delete all my backup in my google account
Hello, the simple way to prevent that is by going to Settings ----> Backup and Reset (depends on name from other model) then uncheck automatic restore.
If pertaining to apps then you cannot mass delete all on google play store account. At consecutive versions of Google Play so not really sure if what version totally can tap all apps to delete.
Google Play Store -----> My Apps -------> Click 'All' ---> delete one by one.