Using FilesConnect app, users can unlink files/folders stored in Google Drive to specific records in Salesforce using the Unlink Record action.
1. Navigate to the Salesforce record where the file/folder is listed
2. Locate the desired file/folder on the FilesConnect component
3. Click the button to open the dropdown menu next to the file/folder
4. Select Unlink.
5. Approve action. This will unlink current file/folder
Note: You could unlink file/folder located only in root.