My way around it, is to make copies of the photos, & write on the back of those with a 5B pencil. Serves 2 purposes..... one, you have pictures identified.... two, there is more than one copy, and if they're stored in different places their chance of survival is greater.
For instance I have one copy of "important" photos, and my daughter who lives in another State has the other..... oh and I also share copies with relatives.
De