Hot answers tagged windows
Why do they end up in the downloads folder in the first place? Many (most?) browsers have an option to ask you where to download the file to, instead of automatically putting them in the 'downloads' folder. That way you immediately decide where to put them when downloading and you no longer waste time cleaning up. For all those files that you only need ...
In your comment to Kramii's answer, you said: It is useful for me, and something I am interested in. That seems to be the primary purpose. You want to understand Windows in this manner, and you're probing it semi-systematically to learn about it. If you get satisfaction out of it, and if you don't really have any other aspirations to make a product ...
You might want to try Hazel, which I use very often to automate a lot of repetitive stuff. You can use it to rename files, delete files that haven't been opened since a certain time, delete duplicates, and so on. It's up to your ingenuity in terms of what it can accomplish for you.
I use OSX, where you can sort files by "added on date". I use that to sort my downloads folder. From time to time I review all items in the folder (oldest items first) and then force myself to either move the file to another location or delete it. An important component in that system is that I rename every file as soon as I download it to make review ...
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