I’d love to see Proton Drive support timeline-based comments on audio and video files—similar to what Dropbox (paid tiers) and SoundCloud offer.

Many professionals in media, post-production, and creative fields use file-sharing services to review drafts and exchange feedback. With timeline comments, collaborators could leave notes like:

• “Adjust volume here (2:15)”
• “This transition at 0:42 feels too abrupt”
• “Love the tone at 1:05!”

Use cases:
• Music producers sharing mix drafts
• Filmmakers reviewing cuts
• Voice actors receiving client direction
• Creative agencies gathering feedback on promos or reels

There’s no privacy-first, end-to-end encrypted platform that supports this kind of feature. Implementing it would make Proton Drive uniquely attractive to creatives who want both security and functionality—and could draw in new users from services like Dropbox or WeTransfer.