In the 1960s the Xerox company brought out a product that made copies of documents on paper. The task was extremely quick and low-cost, plus it started a boom since it was an easy way to produce an instant record associated with a document for your reasons like storing as files and as evidence of documentation.
Over time, photo copying is becoming big business, as more companies released their versions of copiers for your marketplace. There was some talk recently by investing in the appearance in the digital age, that copying documents physically in some recoverable format would become obsolete, as saving documents inside a digital file would be correct and would undertake less space than the filing of physical paper files.
However, copying documents physically remains to be far easier in many cases, than having to go over the digital process, as many times it takes the scanning of your physical document anyway to transfer it into a digital file.
Hence the situation is still one among a dual means of utilizing both methods of storing data. Through the physical aspect it truely does work as long as the files tend not to become to varied, as then a digital concept can have a very high advantage.