Hello there,
Check if you have multiple WSUS servers (Software Update Points in ConfigMgr) .
WSUS will download updates' metadata into SUSDB, download update binary files into WSUS Content folder.
When WSUS sync, it will only download the metadata, when we approve specific update, the update binary file will be downloaded into Content folder.
You can use WSUSutil.exe to get the updates again.https://learn.microsoft.com/de-de/security-updates/windowsupdateservices/18127395
Similar discussion here https://social.technet.microsoft.com/Forums/windows/en-US/8e5234e5-bcec-46f7-8212-ff0dabc9c225/delete-content-of-wsuscontent-folder?forum=winserverwsus
Hope this resolves your Query !!
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