Kevin asks Wes to design Dropbox, with an emphasis on designing the data model and storage techniques to scale out.

Helpful links:
https://www.geeksforgeeks.org/design-dropbox-a-system-design-interview-question/

https://www.youtube.com/watch?v=PE4gwstWhmc

https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API

https://www.ibm.com/cloud/learn/object-storage