I'm thinking about taking my documents out of Google Drive and putting them in Notion, as native files and not attachments. Do you think Notion is a safe environment for this? Turns it into a "drive"?
May I ask why you're planning to do that? Safety reasons? If it's not for safety reasons, put your documents in Dropbox and use my Zapier connection, to transfer its sharelink to Notion. (guide is in German, but it's a step by step guide)