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…