Where do you store your old classes and files, which you don't longer use in a current project?
I have quite a few classes and files, which are no longer required, but which I would like to keep somewhere in case I need to reuse some of the code later.
Currently, I am just copying and pasting the code in a tool called Code Collector Pro.
However, since this seems not to be the most elegant way of storing old code, I would like to ask you: How do you save your old code?