I put all non-text files into attachment/ subdirectory in Obsidian Vault. And on Feb 2nd, 2026, all files in all attachment/ directories were mysteriously deleted. And I didn't find out until today.
I only keep backups for 30 days on the cloud, so that copy is already gone. Syncthing automatically deleted them on all my clients, and I didn't have file versioning enabled.
99% of them are photos - that means I do have a copy in Immich (and S3 backup). But trying to find them one by one would be a pain.
Lesson learnt: Enable Syncthing file versioning. Check valuable assets regularly. Keep a cheap, local backup that can be kept for longer.
Now I'm going to find those pictures based on when the note was created and what they say. Fun.