I would also like to see how others store their cartridges! Good question!

This is how I store mine, but I only have about 24-26. I have 6 in a Jukebox. This box would only hold about 22-24 depending on the thickness of the booklets.

I have my overlays inside their corresponding books and filed alphabetically in little plastic bins. The cartridges themselves are in a hanging jewelery organizer. It works very well and everything is protected and in order.

I found a much cheaper solution. If you are lucky enough to have a Dollar General store in your area. they carry
True Living Outdoors Food carrier UPC 400026 278917 It is a two square containers food storage item that has one taller container and one shorter squatier one they come with a wrap over handle that hooks to the handles on the side of the containers The unit of the two sells for $5
In the shorter container the cartridges fit perfectly. I can get 50 cartridges in each of these containers. I made row dividers for them out of the dollar general tye die poster board, 5 rows of 10 cartridges in each row.
The deeper container is a perfect fit for the handbooks for the cartridges. I can get 25-28 in each box depending if some of them are solutions folders or lite cartridge folders. For those I put the face plate inside the folder or with the solutions I tape the front and back of the cardboard solutions insert together at the bottom and them put the face plate inside that.
I have 156 cartridge HANDBOOKS in 6 of the Deeper square totes and have all my 156 CARTRIDGES in three of the shorter square totes. So compact it is amazing and the whole set up cost me $30 total.
I have numbered all my handbooks in the upper left hand corner with a round circle label written with sharpie and have that same number written on the top rounded point of each cartridge. This way I can tell in an instant if something is not in its proper place. I have all my cartridges listed by number in a 4x4 coaster size book I made I tuck that in my purse when I am out shopping so won't duplicate on cartridges. This is the best system I have tried and works great for me.
I put blank flowered address label on the front of each box and have the numbers listed of which cartridges/ or handbooks are in each box. They all stack on tope of each other and have tight seal lids so take up very little space and are all (156) within reach when I want them. I do have my gypsy but am such a visual person I love going thru my handbooks for inspiration.