Systems and methods are disclosed herein for notifying a user of a change to a file stored in a cloud-based file-storage system. A first indication of a first change to the file by a first user is received from a remote server, where the file is associated with a second user and is stored by the remote server. Subscription preferences of the second user are received. A notification indicating the first change to the file is displayed on a mobile device associated with the second user if a category of the notification is allowed by the subscription preferences. The notification includes a graphical preview of the file, an identifier of the file, and an identity of the first user.