I sorted out my phone photos a while back, and arranged them all properly, but then I found an old backup with loads of missing photos and dodgy file names. Dropbox automatically renamed them during a backup about ten years ago, so I would have had to rename them all and check for duplicates again, and I just couldn't be bothered at that point.
I'm an amateur photographer, so I've got tens of thousands of photos going back at least 20 years, so I really do need to sort them out.
I've got thousands of music files too, mostly as mp3. I've just finished organising those, so the next job is getting rid of the crap and getting better quality copies of what's left.
Funnily enough though, my father was really into the local music scene in the 90s and got me into it, so I've got a load of music from small unsigned bands too. I help with a small music festival here, also for unsigned acts. I haven't upset the postman here though, I've only had posters delivered. So far... 😁