>>44807
I remember talking to somebody on 8chan years ago about the storage life of a DVD. Apparently DVD can get bit rot too after long-term use. It also depends how they are stored and the environmental conditions they are stored, they should be kept away from heat, humidity and sunlight, protected from dust build-up or from being scratched easily. The brand of DVD might matter too, some brands make cheaper ones that may not last as long. Average lifespan of DVDs appear to be anywhere up to 100 years, according to most websites: https://www.sony.com/electronics/support/articles/00009195

I recommend getting an 8TB external drive to store your favorite media for backup, not just relying on something that can, and eventually will, wear and tear.