Data documentation enables data sets and files to be discovered, used and properly cited by other users (human or computer).
Metadata is essential information regarding the data, for example, where, when, why and how the data were collected, processed or anonymized, and information about the availability and original purpose of use of the research data.
Metadata also describes the naming conventions of files, version control and folder structures. Explain in the description also the terms, variables, codes, abbreviations and units.
"The storage root as well as every sub-folder shall include a README.txt file. Each README.txt file describes the current naming conventions and purpose of all folders and files in that level of storage organization. Any additions, deletions or changes to naming conventions or purposes are immediately updated to README.txt."