[showbis]

I know that in the sandbox your search on the forum is limited
You can upload, try to do them like you have got them, in package or individual if you had only one
Don't .zip everything together in bulk

If you study a bit the sandbox and our guidance and the how to post, it is not hard how to name them
add the photo and source of it
Then describe what's inside the .zip
and lastly the links

You can use Meshvault.net or Mediafire or any other hoster where you logon often, so that they won't empty things after that period

When you start getting newer things you do them, so yes you can do as you please 

Cheers,
showbis