Mendeley reference manager
3. How to add reference entries in Mendeley reference manager software
3.4. Upload PDF directly from your computer
Choose Add new -> File(s) from Computer.
Find the PDF file you need on your computer and add it to your Mendeley reference management software. Using the included metadata, Mendeley should do all the reference entry itself. You should also have a PDF file attached that you can read directly in Mendeley.