Yes! Dropbox is a great option for file storage. If you're on the $10/plan or higher, you can use your own Dropbox links with your account. Just be sure to add the ?dl=1 attribute to your links to force them to download (instead of sending the customer to the Dropbox page for that file). More information on that here:
More information on using your own storage can be found in the article below:
Feel free to contact us at firstname.lastname@example.org if you need additional assistance.