Multi-source photo library cleanup
Short answer
The best way to organize photos from many sources is to index every source first, detect duplicates and clutter across source boundaries, keep the best visible version, and present one clean library without forcing you to manually move every file.
Map your scattered photo sources before you move anything.
Create an account for a no-upload planning step: list the places your photos already live, like iPhone, WhatsApp, Dropbox, Google Photos, iCloud, NAS, and old drives.
