These are what I use for my R7, and have had zero issues so far. Your camera’s 4K isn’t quite as demanding data rate wise, so I presume they’d work totally fine for you as well:

https://www.amazon.com/Lexar-Professional-1667X-2-Pack-Uhs-II/dp/B07RCN2BFM/ref=asc_df_B07RCN2BFM/?tag=hyprod-20&linkCode=df0&hvadid=366288502003&hvpos=&hvnetw=g&hvrand=1321134832468118811&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1026339&hvtargid=pla-791330229306&psc=1&tag=&ref=&adgrpid=74513439485&hvpone=&hvptwo=&hvadid=366288502003&hvpos=&hvnetw=g&hvrand=1321134832468118811&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1026339&hvtargid=pla-791330229306

Also https://www.amazon.com/dp/B07RCN2BFM