What do people do with their loved one’s belongings after they are gone?

I guess I’m wondering what to do with things that can’t be donated and other family members don’t want? There are so many photos and journals that meant a lot to my mum but are kind of personal too. I’ve kept all the photos that I want to one side and other family members have done the same. With the journals, they were personal diaries where she would express her thoughts and feelings, rather than a memoir that tells her story as such. Any ideas? I guess it feels really strange to just throw them away but maybe that’s ok? It also makes me wonder what will happen with all my ‘stuff’ when I’m gone as I don’t have children (by choice).