Cards up to UHS-I V3O etc. are dirt fucking cheap these days at all sizes, negligibly any pricier than much slower old options, and all handle video up to at least 200mpbs (which is plenty for most use cases) as a sure thing per the minimum of their speed certification. You only see a noticeable price increase going up to UHS-II V60/V90 needed for 400mpbs+ video (though I have personally confirmed the V30 Samsung Pro Plus 160/120 cards can keep up with the 400mpbs output of the X-T4, turns out some brands live up to advertised speeds better than others).
>>4136979Aside from what this guy mentioned, even if you don't do video, if you ever do high speed bursts they can also be bottlenecked sooner than necessary by having a slow card, as they actually have a higher functional bitrate than video (being that photos are many times larger than any single ~4k video frame) and will fill up the camera's buffer sooner if the card can't remotely keep up.
