Physical Collectors "Should Plug In" Switch, 3DS And Vita Game Cards "Every 5-10 Years" To Avoid Data Loss

Most storage types are subject to bitrot.

DVDs appear to be the cheapest form of long lived media. Some are rated for 50 years, and life can be from 30 to 100 years

M-Disc is a newer optical format that claims 1000 years, but is pretty pricey.