Mendeley is a reference/citation manager with web-based, desktop, and mobile versions. You can sync your citation library between these different versions and across different devices.
You can purchase more personal storage only by upgrading your account. Upgrades are for personal storage and aren't available for shared web space.
Find out more about creating an account here, or go straight to Mendeley.com
This information copied from What do I get with a free Mendeley account? (Last updated on January 19, 2022)
Mendeley Reference Manager (desktop app) simplifies the process of adding and using your references. The Mendeley Cite tool allows you to easily insert in-text citations and bibliographies / references in documents created with Microsoft Word 2016 and above, Microsoft Office 365 and Online, and the Microsoft Word app for iPad. The Mendeley Web Importer allows you to import papers, web pages and other documents directly into your reference library from search engines and academic databases; it is available for all major web browsers.
Get stared with the Mendeley Reference Manager: A Guide for New Users (pdf) or check out the Mendeley Help Guides pages.
Note: The old(er) Desktop app and Citation Plugin are still available for those using pre-2016 versions of Microsoft Word on the desktop.
Register for an Account
You will need an account to use Mendeley. Sign up at mendeley.com
Download Mendeley Reference Manager for Desktop or the Mendeley Desktop (older version)
Use the Mendeley Reference Manager for Desktop to build and organize your collection of references and documents, which you can sync with the web and mobile versions. Drag & drop PDF files into the Desktop to instantly create references. Annotate PDFs with highlights and sticky notes as you read them.
Install the Mendeley Web Importer
Adding the Web Importer to your favorite web browser makes it easy to import references and documents from academic databases. Access browser extension for Chrome or Firefox or add a bookmark for Safari, IE, etc. from Mendeley Web's Reference Management tab.
Install Mendeley Cite or the Citation Plugin*
The Mendeley Cite add-in for Microsoft® Word allows you to insert citations and bibliographies into your Office 365, Microsoft Word 2016 (or higher) or Microsoft Word app for iPad.
The Mendeley Guides provide focused help with:
Installation of Mendeley Reference Manager for Desktop or the earlier Desktop version on Windows (7 or later) and Mac (OS X10.10 or later)
Mendeley Cite: Used with Mendeley desktop on Microsoft Word (version 2016 or higher on Windows & Mac), Office 365, or Libre Office 5
Groups
Citation Guides: APA, MLA, Harvard, citing a website
Web Importer
Browser, operating systems, and text processor version information was correct as of November 2023.