About Dropbox

Dropbox allows you to send files to people that are too large to be sent by e-mail.

Upload the file to Dropbox, and it will generate a special URL from which the file can be downloaded. Dropbox will e-mail that URL to the person whose address you enter as well as to you.

After 24 hours, Dropbox will delete your uploaded file, and the URL will become invalid.

Conceptual design

We made Dropbox to satisfy the following requirements:

  • Should not require the use of a special client.
  • Should be unattractive as an illicit file distribution center.
  • Should not require people to have local accounts or to authenticate at all.
  • Should be usable under all operating systems.
  • Transferred files should be accessible only to the intended recipient.
  • Should clean up after itself.