Yes i said 16 GB. Follow the steps perfectly
1 - Visit here and signup new account [/url]
[url=https://goo.gl/Zbpdg9]
Now signup there and activate account from link sent to mail.
(No need to login dropbox website)
2 - The trick here is to download the official dropox client and login from ithttps://goo.gl/0yXNjG
After you login, simply share some files from client (Optional )
And you just won 500 MB space FREE , just repeat same step 1 & 2 and you get 16 GB FOREVER <3
You can do all same process from mobile phone too as playstore got dropbox app
Credits: Got this from another private forum Tested and works