Hi Lèonie, these are photos that I had saved from iPhoto. I was getting zillion duplicates so decided to turn iCloud off to sort out my 68,000 before turning Photos on, on my then new iMac (about 2 years ago). Backed up my iPhotos on my MacBook Pro, Time Capsule and a few external HD’s. Unfortunately I got robbed, all gone except my iMac (luckily) so now trying to import all the photos while iCloud on. Not sure if it’s the right thing to do considering the number of photos. They are work and personal photos, some old, scanned, but mostly using my phone since 2001 I think. So all iPhones starting from the first one. Sorry for the detailed info.
At the moment, I’m on iPhone 7plus, iMac (Retina 5K, 27”, late 2014, OS X El Capitan 10.11.6, iPad Air2, iPad Pro 2nd gen. These photos are my work and my life :( also have a whole batch of greyed up pictures I’m assuming I can’t do anything about.
Hope this info helps? :) sorry too detailed.
Randa