How the Information Stored in My Chosen Business

In my chosen business all the storage and retrieval of information is done manually and it's carried out through admin.
When admin (owner) receives paper documents which includes business letters, memos, reports, purchasing documents (quotations and orders) financial documents (invoices, statements, banking documents), leaflets, brochures, booklets, catalogues and legal contracts, the first process he do is to sort all these papers and convert them into two piles, 1 pile for important documents and the other for unimportant stuff e.g. he can punch holes in a piece of paper or letter for filing in a folder, but he couldn't do this with a thick catalogue! And this is also because some items need to be kept for a long time for legal reasons, whereas others only need to be kept for a few days or weeks.
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