The shared storage would then be shown in your OneDrive and you could upload files there. It would be taken from my OneDrive storage quota, not yours.
Any of you theme geeks, If interested just PM me your MS / OneDrive email address, I'll take care of the rest. You would have edit rights for the shared folder and could then share / post links to that limiting the rights for anyone clicking the link to View only (download).
I would only grant edit rights (upload, delete, edit) to you theme geeks, the general public could download without an MS account but nothing else.