The Sky Drive is a feature of the new Delhi student email system. It allows students to upload/download and store up to 25 gigabytes of documents online, as well as to create, store, and edit Microsoft Word, Excel and PowerPoint documents, collaborate with others and share online documents with instructors or others. See more here:
Since the Sky Drive feature allows you to create folders and only provide access to certain people to certain folders or documents, it can be used as an electronic portfolio (aka e-portfolio).
Below are links to presentations from another institution showing how to set up an e-portfolio using your Sky Drive: