In our industry, we have a legal responsibility to keep records for 15 years. Have tried to argue electronic copies as adequate records, but legal department refuses.
Before you go electronic you might want to check your legal footing too.
Our grudging solution-filing cabinets with orders in ~ chronological order. We lose a lot of floor space to them, but it does make it easier to trash paperwork when due. And retrieve for lawsuits.
AJP