USB Disk SE is a versatile file manager designed for iPhone and iPad users, enabling efficient storage, viewing, and management of various document types. With an intuitive interface, it allows users to drag and drop files via iTunes, and access cloud storage services like Dropbox, Google Drive, and OneDrive. The app supports a wide array of file formats, including PDFs, MS Office documents, images, and audio files, making it a comprehensive tool for managing documents on mobile devices.

Key features include a built-in document viewer, full-screen viewing options, and the ability to navigate using swipe gestures. Users can also perform basic file operations such as copy, paste, and delete, alongside advanced functionalities like email integration and slideshow presentations. While the app offers many features for free, some advanced options require a subscription, ensuring flexibility depending on user needs.