So...lets start from the beginning..
I have installed Avast Mobile Backup..backed up some photos + contacts...
and I have decided to delete all this data. So I have deleted Avast data and aplication cache + uninstalled Avast Mobile Backup... of course I have deleted all backed up data from my google drive...+ deauthorize avast from google drive in avast.com
after that I have installed Avast Mobile Backup again ..and went straight in to to application menu in to Browse backup...and guest what..
ALL backed up data - recently deleted from G drive....everything is there..
that means Avast is storing this data on THEIR SERVERS...not just on Google drive!!!!
AND IT IS NOT POSSIBLE TO DELETE THIS DATA
ISNT THAT PRIVACY VIOLATION...