THE BEST SIDE OF CHILI POWDER & SWEET PAPRIKA POWDER

We have dried crimson chile' despatched to us (Wisconsin) in gunny sacks from family in Socorro New Mexico. How long can we securely preserve them stored in the sacks?It usually takes several months for the jalapenos to completely dry with this technique, but it really'll be worthwhile!I have experimented with with micro wave oven. i dont now what