Is the C:\ drive inside the server machine getting filled up because of rendition data?

ICS keeps generating temp files in the following location continuously during renditions-

C:\ProgramData\Bentley\OrchFwrk

In case you need this temp dump to be created on the D drive, create a system environment variable,

UserDefinedBasePath=<path_to_new_temp_location>

For example,

UserDefinedBasePath=D:\OrchFwrk

Note: Remember to create folder of the exact name inside the D drive and restart the ProjectWise Orchestration Framework service to apply the change.

This works on ProjectWise Update 3.2 and above.