Duplicate files · Duplicates in cloud accounts
Why don't Google Docs, Sheets and Slides show up in duplicates?
Short answer: Google Docs, Sheets and Slides are stored in Google's own format with no content fingerprint to compare, so they're skipped rather than guessed at. Ordinary files in Google Drive — PDFs, photos, videos, Office files — are compared normally.
Google Docs, Sheets and Slides aren't ordinary files — they live in Google's own format and carry no content fingerprint that could be compared, so Storage Studio skips them rather than guess. Everything else in your Google Drive, such as PDFs, photos, videos and Office files, is compared normally.
If you have several copies of a Google Doc, you can tidy them in Google Drive itself.