Dropbox uses the freemium financial model and its free service provides up to 18 GB of free online storage (2 GB + 512 MB per referral). Will this Dropbox download work on Windows? The free Dropbox download for PC works on most current Windows operating systems. Clicking this link will start the installer to download Dropbox free for Windows. Just click the free Dropbox download button at the top left of the page. Once the download finishes, click Run to start installing Dropbox. Your Dropbox download should automatically start within seconds.