Create a free account on Zotero.org. Creating an account will allow you to access your library from multiple devices and create shared libraries for collaborative projects.
Your free account comes with unlimited data storage--meaning your item metadata, notes, links, tags, etc--everything except your attached PDF and other files. See below for some options for PDF file storage with Zotero.
1. Go to Zotero > Edit > Settings > General > Locate.
2. Click on the dropdown menu under 'Resolver'. It is preset to 'Custom'. Please click to change this and select University of Alabama from the list.