Design Dropbox

Design a cloud file storage and synchronization service like Dropbox.

Requirements:

• Upload and download files
• Sync files across multiple devices
• Share files/folders with other users
• Version history and rollback
• Handle large files efficiently

Key Components:

• Block Server (chunked uploads)
• Metadata Service (file info, sharing)
• Sync Service (conflict resolution)
• Notification Service (real-time updates)
• CDN for downloads

Discussion Points:

• Chunking strategy for large files
• Delta sync to minimize bandwidth
• Conflict resolution strategies
• Offline support and sync queue
• Deduplication across users