Just open the folder that the file is in and you can check it from there. Right click on the file and click on properties. Created: is the date and time the file was created.

That time could be deceptive, if the file was copied from another folder, the time shown would be the time it was copied not the time it was downloaded.

If you mean the time a file was uploaded from you, I don't think it's possible to tell. Unless you were sitting there watching.

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