So per my research and testing thus far the Pi needs Micro SDHC & Fat32 Formatting.
Fat32 will only go up to 32gb in size without special tools, which you can get.
So technically you can make fat32 bigger… Okay
I can’t find any legitimate Micro SDHC cards that go over 32gb, once you go above 32gb its a Micro SDXC card, which will not work in a Pi.
Now I did find some 64gb’s that said they where Micro SDHC but I don’t think they were kept causing all sorts of issues, seemed unreliable at best.
However I still need about 40gb’s of space to fit all my roms on one installation of retro pie. I do not want multiple cards to break my emulators up across seems silly.
So I see this thread here about Karloss using a 128gb card to boot from.
How to run from USB (the best method)
Where are these cards and is there no recommended confirmed to work Micro SD compatibility list?