"What is the best way to store a knife?"
Very broad question, kinda hard to figure out just what you mean. But I will take a stab (pun intended) at it.
Are you worried about them being stolen? Or just trying to organize what you have?
I have a small number of various knives, was trying to figure out how to store them myself. Then saw a small nylon pack in a Brigade Quartermasters catalog. It unzipped to lay flat with about 18 pockets to put folding knives (or SHORT fixed blade) in. Keeps my collection organized and I can throw it in my gun safe.
If storing a knife you should probably clean and oil it as you would a gun.
I don't know if this helps or not. If it doesn't, can you be more specific?