The NC State Historical Records Advisory Board, the State Archives of North Carolina, supported by National Historical Publications and Records Commission have produced a series of videos about the care and handling of family papers.
These are free, run about 10 minutes each and can be accessed below or at UpFront with NGS:
#1, Identifying and Protecting Essential Family Records
#2, General Paper Preservation Tips
#3, Caring for and Sharing Family and Personal Papers
#4, The Care and Preservation of Family Photographs
#5, Managing and Preserving Digital Images