What are the advantages of using an ePortfolio?
ePortfolios offer a number of advantages:

• Collect and reflect on your work.
• Save educational and work experience
• Create a plan of study and work online
• Showcase achievements
• More active involvement of the student in the selection and design process
• Strong sense of personal responsibility and ownership
• Fuller picture of student achievement
• Can show examples of performance assessment
• Condenses collection of data and artefacts and reduces quantity of paper handled and stored
• Requires reflection
• Enables performances to be viewed more than once in context

Source: Wikieducator

Something I found on MyPortfolio http://docs.myportfolio.school.nz/index.html#