Honestly, while speed is great, you realy need to focus on sustained write performance and controller reliability for a body like the R10. If youre pushing those high-speed bursts (especially that 23fps electronic shutter), the buffer fills up fast, and a card with a poor controller can overheat or cause write errors—total nightmare if you lose your shots. I generally stick to these for my gear because they handle the heat and data cycles better than the average consumer stuff: - ProGrade Digital SDXC UHS-II V60 Gold - These are basically industry standard for stability. They undergo more rigorous testing than most, so they're less likely to fail during a long shoot. - Kingston Canvas React Plus UHS-II - This is a sleeper hit. Its a V90 card that is usually way cheaper but has proven to be super robust in real-world use. Tbh, the most important thing for reliability is where you buy them—avoid the too-good-to-be-true deals on random marketplaces to stay away from weird fakes. And always do a full format in-camera before a shoot to keep the file system clean!

This is exactly what I needed to hear. Youre a lifesaver honestly.

I've been using SanDisk Extreme Pro UHS-II cards (300MB/s) with my R10 for about a year now. Overkill? Maybe, but I never have to worry about buffer issues when shooting high-speed bursts. Worth the extra cost for peace of mind.

EOS R10 supports UHS-II SD cards, so the best choice is to get a UHS-II V60 or V90 card, I got Lexar 128GB Professional 2000x V90 card, very fast.