canon r6 mark ii

I recently upgraded my older R6 to the Mark II and thus far it has been a love / hate relationship. I was advised that my Tamron lens would do just fine, with an adaptor. I have been using a Ykeasu adaptor thus far. When there is plenty of light, the results have been wonderful. When there...

What is the cheapest Canon brand speedlite that will work with the R6 Mii? I am reading conflicting info. Thank you.

What size card do you suggest to shoot RAW? I just bought a Canon R6 Mii and two 256gb cards. After watching a couple Youtube video I am wondering if I need larger cards. Thoughts?

How should I store my lenses? Rear cap up or down or sideways? When on camera is on its side fine or should rear of the lens be up? Thanks