I just keep mine sealed up in the bag they came in and I dig into it once a month for 3/9 depending on how many clones or seeds I'm working with. As for long term storage I've heard to freeze em but idk for sure . I've been working out of the same bag for 9 months now and I also have a bag that came with my humidity dome, no mold no issues to mention. I know this wasn't much help but it what I've done with success so for .