The video explains the 3D Drive app within the 3DEXPERIENCE platform, highlighting its role as a cloud-based storage solution accessible via web, mobile, or desktop for offline use. It demonstrates file synchronization between local folders and the platform, similar to Dropbox or Google Drive, but with added integration for SOLIDWORKS. Users can upload, rename, delete, and share files or entire folders with colleagues or external users via secure links. Administrators can manage quotas, revoke access, and transfer files when users leave. The system ensures all shared content remains up to date, avoiding outdated email attachments and supporting collaborative design workflows.