Please suggest me a good SD card for my new Canon EOS R10?
EOS R10 supports UHS-II SD card. So you can choose any UHS-II SD card for it.
Honestly, if you're like me and trying to save some cash, you don't always need the top-of-the-line stuff. I've been using the SanDisk 128GB Extreme PRO UHS-I in mine and it works totally fine for basically everything I do. UHS-II cards are really expensive - like, sometimes double the price - and I don't think you really notice the difference unless you're doing super long bursts of photos or something. You can usually find the Kingston Canvas Go! Plus for a really good price too, and it's been pretty reliable for me so far. Are you planning on doing a lot of 4K video? Because if you're just doing regular photos and stuff, the cheaper UHS-I cards are probably the way to go honestly.