What is upload linked files in BIM 360?
Upload Files option in BIM 360 is simply an upload tool that allows you to upload files from your local desktop to BIM 360 Platform. Upload Linked Files is a great option to upload files (i.e. Revit models or AutoCAD files) that include XREFs.
How do I upload a DWG file to BIM 360?
Upload DWG Files
DWG files are uploaded directly to Docs, either through the web interface in the Files tool, or through Desktop Connector. In Docs, open the Files tool and navigate to your team folder in Project Files. Click Upload Files. Choose your DWG files to upload and click Open.