[anshorei]

I've always loved how shotwell does it: "YYYY/MM/DD/filename.ext"

The only downside has always been that merging your photo libraries when you did two different things can give some funny results. Shotwell will split the events based on the import, but if you browse the files without shotwell or reimport them later you lose that.

[sneak]

After 20 years of digital photography, this is the way:

    YYYY/YYYY-MM/YYYY-MM-DD/YYYY-MM-DD.SHASUM.IMG_NNNN.EXT

This lets you keep date metadata on individual files moved or copied out, detect bit rot, etc.

[nine_k]

Interesting. Have you noticed any bit rot on your images?

[sneak]

No, but it's a thing that happens. I keep mine on zfs raidz2 with weekly scrubs.