“Invite some friends to join Dropbox” – Send an invite to one or more friends to create a Dropbox account.
“Share a folder with friends or colleagues” – Share a folder with another Dropbox user.
“Install Dropbox on other computers you use” – Install and sign in to Dropbox on another computer.
“Put files in your Dropbox folder” – Upload one or more files to Dropbox to complete this step.
“Install Dropbox on your computer” – To complete this, you just need to download and install the desktop app and sign in.
“Take the Dropbox tour” – You need to complete the tour of the website or app.
By doing this, you’ll get an extra 250MB of storage. The first is to complete five of the seven introductory steps. There are two ways to get more free storage for your account. Tips to Increase Your Storage Space on Dropbox