This is a great question! In this day and age, ensuring that your students build their learning journey through a portfolio is more important than ever. With each Guided Project and Sandbox students create on BSD Online, it is automatically stored inside “Your Portfolio”.
If your student leaves the school and/or completes their schooling, they will still have access to all the Sandboxes they have created and they are free to share this with friends, family, prospective schools, and employers. For this reason, make sure your students “Export to sandbox” and make it their own after they complete each Guided Project 
So, in short, yes! Students will be able to keep their work forever 