How do you handle cloud photo and video duplicates?

I've been dealing with this for years. Between Samsung Gallery syncing to OneDrive, Google Photos backups, and the occasional app reset that re-uploads everything - duplicates pile up fast.

WhatsApp makes it worse. Share a photo with someone? Now you have the original in Camera Roll AND a copy in WhatsApp Images - both backed up to the cloud. Receive photos from family? Auto-saved to gallery, then backed up again. The duplicate math adds up quickly.

Manual cleanup is tedious. Desktop tools exist but require downloading everything first. Cloud storage providers don't offer built-in duplicate detection.

How do you handle it?

- Just ignore it and pay for more storage?

- Periodic manual cleanup sessions?

- Third-party tools?

- Given up entirely?

Curious what workflows people have found that actually work.