DropBox

Dropbox is a cloud storage service that enables you to do everyday work more efficiently such as file storage & synchronization, personal cloud storage, and many other things. With dropbox, you can store small or large files securely and access them whenever you want. 

With forms.app being integrated with Dropbox, you can automate many processes such as creating new folders, uploading files that you received through your forms, and many other useful things.