@william_jin Of course, the presence of cloud storage is a very necessary feature for this kind of tools. In the future, I plan to add the ability to work with cloud storage for editing your ideas on desktop, mobile and tablet. In the meantime, you can look at SpaceDrive (https://www.spacedrive.com/), it offers excellent options for storing files on different devices.
WhiteSpace
Pile Commander
Pile Commander
Pile Commander