How to Create Your Own Research Library
There are three main free pdf file managers online for storing and managing your research.
Of the three I have found Mendeley to be the easiest to use.
All give you 2Gb free online storage and with 4000+ articles in my personal library I have only utilized 1.3Gb, so 2Gb is ample.
Setting up an account with Mendeley is simple on the home page and there are excellent tutorial video’s on how to set it up and use here.