You might be wondering: who can access the docs in "My Docs" within a workspace? This folder is inherently private. If you want to share these docs, you can move them into a shared folder within the workspace.
When you leave a workspace, you'll still be able to access your docs in "My Docs" and move them into new workspaces. Just note that if they were part of a paid workspace, you might lose some capabilities within your docs.
If you get re-added to the workspace, then your docs in "My Docs" will look the same as they did before you left.