Systems and methods are disclosed herein for accessing portions of a file at a client device. One or more portions of a file are selected for downloading to the client device, wherein the file is stored on a web-based storage system in communication with the client device via a network. At least one portion in the selected one or more portions is identified that is not stored on the client device.A request is transmitted, without user interaction, to the web-based storage system to download the identified at least one portion of the file, and the identified at least one portion of the file isdownloaded to the client device via the network.