If you’ve uploaded files to your Google drive, you may notice that you can’t edit them until they’ve been converted to a Google document.
Why convert to a Google document format?
Converting a file to Google Docs format allows you to edit, collaborate on, and share a doc online. You can decide to convert a file to Google Docs while you upload it or after uploading it. Google Drive gives you 5 GB for your synced and uploaded files. However, Google Docs and files converted to Google Docs format don’t take up storage space.
How do I convert a file to a Google doc?