Archival records are created or received by a person, family, or organization, public or private, in the conduct of their affairs that are preserved because of the enduring value contained in the information they contain or as evidence of the functions and responsibilities of their creator.
Archival records connotes documents rather than artifacts or published materials, although collections of archival records may contain artifacts and books. Archival records may be in any format, including text on paper or in electronic formats, photographs, motion pictures, videos, sound recordings. The phrase archival records is sometimes used as an expanded form of archives to distinguish the holdings from the program. — Society of American Archivists
Finding Aid is a document containing information about a collection of records. Finding aids often consist of a documentary inventory and description of the records, their source, and their structure. It serves the purpose of locating specific information within a collection. Finding aids in the 19th and 20th centuries were paper documents, but now they can be created in electronic formats. The standard machine-readable format for manuscript collection finding aids is Encoded Archival Description. — Wikipedia
ArchiveGrid includes over 7 million records describing archival materials, bringing together information about historical documents, personal papers, family histories, and more. With over 1,400 archival institutions represented, ArchiveGrid helps researchers looking for primary source materials held in archives, libraries, museums and historical societies. — Archive Grid, OCLC
Here are links to pages about closely related subjects.