Is it possible to recycle files?

Lets say I go into my music collection and find a duplicate ‘song’.
Or i find two films entitled identically except for the enumeration tag (2) on one of them ( or the word ‘copy’ at the end).
Is there a way and if so how, to ‘overwrite its contained data with something else… recycle it?
Deleting it is such a shame and a waste of good bytes!
Would I need a specific software ?
I use Ubuntu, which is satisfying me quite a bit as it seems to have all things needed for the basics and a bit more.