I have my saved seeds everywhere. I had them in cardboard boxes which have seen better days. Some got wet, some got chewed by mice where I keep them in a shed. I needed to get better organized and wanted better protection from the elements and mice so I found some boxes with lids with clasps.
After that, I got some cardboard dividers for the different varieties of vegetable seeds. I had to trim them down to fit in the box and I had to fold over some of the seed packages so they would fit inside. I also made some labels for each box like Cold Season varieties, Warm Season varieties and many other categories. So far I have 6 boxes done. Nice project for winter.