You can make and edit notes in Rethink, but editing other files such as PDFs, docs, photos, and videos is not currently available.
Soon you will be able to edit your files on Rethink using apps from the Rethink apps suite. This functionality is currently under development.
As a workaround, if you're using Google Drive, you can create files docs, sheets, or slides from within your Cloud Drives and edit them in a new tab. These newly created files will immediately show in the Cloud Drive you created them in.
For additional questions, please reach out to firstname.lastname@example.org.