Storage discs in spindle and dvd case

The Spindle packaging used in DVD packs and the black DVD case box are the hermetic packages and can store moisture inside and the humidity will not come off if you do not open spindle and dvd case black and the humidity will damage the storage of the dvd discs? Spindle and dvd case store moisture equals plastic bag?

https://http2.mlstatic.com/estojo-unico-capa-dvd-box-amaray-preto-grosso-c100-unidades-D_NQ_NP_17960-MLB20147341942_082014-F.jpg