Hi,
Thanks for posting in Microsoft MECM Q&A forum.
1,Yes it is expected behavior. We cannot run ContentLibraryCleanup.exe tool on the Site Server, also if the DP is co-located on this System.
Similar thread for your reference: DP co-located on site - free space problem
2,To free up the disk space on the site server and DPs, please delete all the unwanted applications, drivers, OS and packages on the SCCM console. Please also remeber to delete the files that you manually place into a location (source location). Driver/application packages never reference this location again (although other things do).
Hope it helps. Thanks for your time.
Best regards,
Simon
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