Owncloud issue: Your storage is full (windows 10)

Hello, I have a storage limit (22.7 Gb) in Owncloud account running on VM:

Increasing the storage in Virtual Media Manager does not help:

by the way, after the VM start the storage is not limited
22 of 30
however after some syncronization in Ownclowd client the error message appears.

How to fix this? Any helpful advices will be appreciated (unfortunately I did not find a solution in Google)