Life expectancy for unburned Verbatim AZO DVD-R?
 

What is the useful life expectancy in years for store all files burned correctly for future of my VERBATIM DVD-R 16x 4.7GB AZO ID: MCC 03RG20 stored inside black case dvd case inside box temperatures: day 31ºC, afternoon 32-36ºC, night 32ºC humidity 40% -52 % Day, afternoon, night (not rainy season)? Mdisc is the best option under these conditions?