My employer had a kind of "Google for life" plan for GSuite/Drive from years ago, but the current proposition from Google apparently is too costly and we must reduce space to respect a quota. The solution involves moving files around (looks like OneDrive will be the "for life" choice for now). But, since certain files (Google Docs, Google Sheets, etc.) don't work on OneDrive (or outside of Google), it's important to identify them, so they can be converted or whatever.
I tried using type:document type:presentation type:spreadsheet type:drawing in the advanced search in Google Drive, but sadly this also returns Microsoft Word .doc and docx files, .psd files, .xlsx files, etc.
How can I locate all the files that are Google-proprietary in a Google Drive?