It depends on what I’m doing. For general use I just use the bag that came wit the fly more combo. If I’m traveling there is a spot for it in my camera bag.
I only buy "hard cases" for my drones. The one for the Mini 2 is a Lekufee. Has pre cut foam, holds up to 7 batteries, plus enough storage for your extras, props,charger,tablet holder etc,etc. Got it off of Amazon for around $45, was shipped in 2 days. It's a bit large, not for backpacking, but the "protection" was my option in traveling. The only downfall I can see is a dual hinge, I prefer a single length hinge, like on the Nanuk's. They're a little more $$ but can justify it for your larger drones MA 2's, Pro etc,etc. Good luck