When you say that this is 'horribly space consumptive', you don't seem to be taking into account the fact that Moodle 2 stores identical files only once. If you upload the same file 100 times, even if you give it a different name every time, Moodle will detect that the contents are the same and only store the file once on the server (with multiple references to it in the database).
Example where Moodle 2 consumes considerably more space, not less
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