I Have 20 Years of Digital Files. What Do I Do with Them?
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The proper way to deal with it is not sorting or filtering. The proper way is to precisely extract what you actually used (like in: "it happened in June") in the recent years and then hard-delete the rest. Give it ten minutes, then just do it.
When later you remember that you had something but now it's gone, think about the tradeoff between searching through the pile vs searching through the internet and how rarely you refer to the pile compared to efforts spent on maintaining it.