As part of one of my previous jobs, at the hiring one told me that the people in place did not have the necessary skills or time to develop and maintain a storage system.
After careful observation, I noticed that the system was good, but the preservation of documents were far too long. Whether in the fiscal year, there were 2 to 3 years in files. Or at the archiving, where there were more than 10 years.
Yes, there is a regulation concerning the documentation, but a phone bill (supplier account payable) paid, without dispute, used in the compilation of the current fiscal year, must be archived at the end of the year and retained for 7 years. After 7 years, this bill will be destroyed without problems and to be ecological the paper will be recycled.
Here! Simple as pie.