Full disk OperatelITData
I have VM with 800xA System on it just for testing, for some reason and even after shutting down some alarms and events services, the OperatelITData1 keeps getting bigger, around 4 GB which I need to keep deleting its content to be able to use the system, maybe I am missing some services to disable some logs? Is there a place to check what exactly being logged? The history folder is the one which keeps getting better, other folders are empty. The VM is 60 GB so it is not that small.
Erasing parts of OperateITData is not feasible, compare with "cleaning" C:\Windows\System32\... your system will likely malfunction or crash.
What subfolder is growing?
Having a VM with a large historian configuration will take its toll. If you need the trends you can easily just reduce the logs' retention period on the Log Template aspects if you are using Basic History, the size of the log files will be scaled down automatically. With no need for trends, you can disable Basic History and empty its folder to save disk.