To link you Dropbox account to ForeFlight Mobile, follow these steps:
1. Log in to your account on ForeFlight on the web.
2. Click on the button with your name on the left.
Image 1. Click the button with your name.
3. Click on the INTEGRATIONS button.
Image 2. Click the INTEGRATIONS button.
4. Click on the CONNECT button in the Amazon, S3, or DropBox section.
Image 3. Click on the CONNECT button in the Amazon, S3, or DropBox section.
5. Name the catalog what you want it to display as within ForeFlight Mobile, select DROPBOX as the storage provider, and click CREATE.
Image 4. Enter a catalog name, choose Dropbox as the storage provider, and click create.
6. You will be directed to a Dropbox login page. Enter your Dropbox login information and click SIGN IN.
Image 5. Enter your Dropbox login information and click SIGN IN.
7. On the next page, you will be asked to allow ForeFlight to access its own folder within Dropbox. Click ALLOW.
Image 6. Click ALLOW.
8. You will be redirected back to the ForeFlight website and see a confirmation at the top of the page that your Dropbox account is now linked to your ForeFlight account.
Image 7. Confirmation of account linking.
9. Once you have linked your Dropbox account to your ForeFlight account, any PDF or image document you place in the /Dropbox/Apps/ForeFlight folder will automatically be synchronized to your iPad, in the Smart Binder whose name you chose in step 3.