disadvantages?
the main one i know of is it just freezes the trichomes (i dunno why ppl keep misspelling that word and putting in the extra R)
and they fall off a lot more and a lot easier when its taken out, or handled in the bag.
that and they tend to swell and burst due to freezing.
& OP-
the BEST way is a glass jar.
a wooden box, or "humidor", even with a moisture monitor, will still leech minor amounts of thc from your herbal, just like a baggie does.
permeation i believe is the term. (due to teency weency holes in the material; wood or plastic bag)
glass doesnt, and keeps your herb fresh for YEARS.
(make sure you DRY that shit out first though!)