Never used DropBox before. Started a new position and was emailed an invite to edit a folder on DropBox by a co-worker. My questions are: This folder is quite large and when I created my log in at the Basic level it said I was out of storage instantly. Do I automatically need to upgrade to more capacity if all I am doing is sharing this other file? or is there a version where I can piggy back off theirs and not need my own account?