I've been collecting discs on games I missed in 7th gen. Mainly the Wii and PS3 and in rehousing them into color coordinated wallets I check their backs and to my horror my Xendoblade Chronicles disc was the most bronze I've seen any disc I've owned (except a few DVDs, owned 6 years). It was a used game and I looked back on my old Wii discs I had since new, badly scratched but still playable and silver as they first were. As much as it's more beautiful (and resellable) to store them in original casing I've found more of them used in worse conditions than in basic sleeves. What's your best strategy to disc preservation? Personally I have CD/DVD wallets and store them on bottom shelves, my main climate is hot and dry with mild cases of humidity in winter, most DVDs have held well.