The many memories documented and stored there over a considerable number of years have formed the basis of her just-released book Snow in the Lindis, an Autobiographical Ramble.
Mrs Snow (82) has kept daily diaries since she married her late husband Max in 1954.
''And I used to type a letter to my mother every week and she kept all those ... [and] if anything comes into this house I go through to the office and I file it away.''
With no shortage of material, Mrs Snow took two years to fill 480 pages with her life story.
''I feel it's too big, but then it's because I've lived for such a long time.''
The book touches on her early years on Malvern Downs Station, which her father, Hector Gibson, bought in 1924 when her mother, Eileen Jolly, was working at the Tarras post office.
''I think he bought a property near Tarras to be closer to her. Isn't that what men do?''
Much of her story centres around the neighbouring 14,000ha Morven Hills Station - also owned by her late father - which she and Max managed, as well as the couple's overseas travel, their retirement to Wanaka in 1987 and Mrs Snow's years after Max's death in 2008.
She began writing about 10 years ago, but lost all her work when her computer crashed.
Many years passed before she revived the project.
''When I turned 80, I said right, I'm going to put my story down.
''I had an interesting life ... and unless it's down on paper nobody knows.''
Mrs Snow believed since the advent of computers, there was no excuse for people not to record memoirs of their life.
''We've all got a story to tell. I firmly believe that and I wish my grandmother had written a book when she was growing up. She had nine children. Imagine her life.''
A major publishing house is interested in Mrs Snow's book, but wants to produce a version using only excerpts of her story.
''And I said no. I've spent two years on this ... This is my life.''
Determined to support local business, she paid a Wanaka printing company to produce 200 copies of her book.
Only 100 of them are being sold to the public.
The rest she is keeping for those closest to her.
''I really haven't put it out there to be patted on the back or anything like that. I just put it out for my own family, for my grandchildren and for my ancestors.''
