You can move sessions from one workspace or folder to another by clicking on the More options icon (the three vertical dots)on the session card, clicking on ‘Move to…’ and selecting the destination workspace or folder.
Moving sessions is restricted to sessions where you are the owner of the session. So, for instance, you may move sessions from your Personal workspace to a folder in your Team workspace, but you cannot move a session from one folder to another within your Team workspace unless you are the owner of that session. (Except, if you are a team admin.)
Similarly, you can also move folders between workspaces or into another folder within the workspace, as long as you own the sessions within that folder.