Now I put everything on my smartphone and save it to a disk whenever it accumulates, fearing loss. But how did you preserve photos from the film era? Since my children were born, I've been storing the negatives of photos from that time in two of these KOKUYO boxes. After I started using a smartphone, I bought another box just in case, right before these negative film boxes disappeared from the market. However, I managed to fit everything in the two boxes, and I thought I might be able to reduce the contents of the two boxes even further if I carefully selected what to keep, thinking my children might need them in the future... so I left this one box unused. I'm also worried that I might not be able to develop the existing negatives anymore, but if I get rid of them, a part of my past will disappear... And yet, I don't know when current smartphone and other media will become obsolete. If I were to dispose of all the valuable films from my father's and grandfather's cameras from the dawn of photography, it would be like losing my memory... I'm struggling with what to select and leave for my children and grandchildren, caught between the progress of technology and preservation. It holds a considerable amount, equivalent to the developed albums, and allows for slimming down the albums. I am listing this as a baton touch to those who can make good use of such film storage boxes. How about using this during the long New Year's holiday of the 9-day consecutive holidays to organize your remaining negative films?