After I harvest my bud, I let it dry out in a cool dark place for a week. Then I put it in zipper-lock baggies, one ounce each and while rolling the bag closed, with the zipper a little bit open, squeeze ALL the air out (air and heat degrades weed faster than anything) and compact the weed, then I zip it shut and roll it up and tape it closed and put it in the freezer until the day I need it. Best would be a vacuum bagger for your long-term supply which you keep in the freezer.