Thought I'd revive 2 old posts for the benefit of those that aren't aware of them. 4GB isn't much, but hey, it's free. Once you've claimed the bonus, apps can be deleted without losing the additional storage.
Claim extra 3GB free
Claim extra 1GB free
Note: The Carousel bonus replaces the Camera Upload bonus that was offered with the Dropbox app. If you’ve already received the full bonus space from using Camera Upload, it can’t be credited again. You can check if you’ve received the bonus space in your account settings.
I tried to take advantage of this last time….but it didn't work…I only got the standard storage nto the extra as well.
I will retry.