USB Disk

USB Disk is a fast, secure file manager and document viewer that turns your phone or tablet into a portable USB drive. Easily transfer, organize, and view documents, photos, videos, and audio offline for efficient on-the-go work. Core features include quick file transfer via cable, Wi Fi, or cloud services, a built in viewer for PDF and Office files, and private storage with optional passcode protection. Ideal for productivity and utilities use cases, it streamlines file access, sharing, and backup across devices. Keywords file manager, USB drive, document viewer, cloud storage, file transfer, offline files, PDF reader, productivity app.