Trello – Ability to add link to Dropbox folder in Trello cards

I think this is fine if you are only testing something for a few friends. However, there is an issue with using too much bandwidth if you try to host something through your public folder that becomes too popular. As per https://www.dropbox.com/help/45:

There are currently no hard limits on public bandwidth usage. We do, however, have an automated system for detecting and flagging unusual amounts of bandwidth usage. We will send an email notification whenever an account is flagged. Once flagged, public links will be temporarily disabled and users who use the links will see an error page instead of your file.

The link generated for a file is something like this:

https://www.dropbox.com/_someRandomStrings_/_theNameOfTheFile

If you replace www with dl it will take you directly to the respective file. Alternatively, adding ?dl=1 at the end of the link above, will redirect it to the dl.dropbox.com URL.

Now, if you have the link to a folder and you add ?dl=1 at the end, it will start downloading it as an archive.

Source. And the official source.

(I have tested the method and it works.)