In archives, what is the difference between traditional organization and one document at a time? Can you give me an example_ I don't have any points, thanks!

For example: accounting files, accounting vouchers should be grouped together it belongs to the same class of things and paperwork files is that several pieces of information can be grouped together components (eg: first to sixth grade semester grades, would have been a grade on the group of paperwork, for the sake of convenience on the grades of the six grades grouped together into a piece rather than a volume of it) so that may be a little bit of a headache it! More practice will understand it