Design Cloud File Storage

Design a cloud file storage service similar to Google Drive. The system should allow users to: - Upload files. - Download files. - Store and retrieve file metadata such as name, size, owner, creation time, update time, and storage location. - Organize files in folders. - Support basic sharing and access control. Focus especially on separating the metadata store from the blob storage layer. Follow-up: Files may become very large and should be split into smaller chunks. Extend the design to support chunked file storage while preserving file metadata and enabling efficient upload and download.