Vm upgrade issue

Hi all,


I am  facing Low disk space issue in Dev VM’s having PU 40. On checking the disk space it was noted that drive C is full. These VM’s were provisioned ~2 weeks back. Also please note MSQL Logs(H) is full which gave a build/sync error in 1 of the environments in which we were able to open Visual Studio. 

It seems due to the above issue we are not able to upgrade the machines to PU 41 as well. I get the preparation failed error. Any pointers wrt resolution of this would be really helpful.