I recently bought a Mini 4k and love flying it. But I noticed that when I shoot videos in 4k30, there’s some lag, like a frame skip every 5 seconds, so the videos aren’t as smooth. This doesn’t happen with 1080p30/60 footage. I think it might be my memory card. I’m using a Sandisk Ultra Class 10 A1 card. I’ve attached an image of it. Do you think getting a Sandisk Extreme card will fix the problem, or could it be something else?
Your card is too slow for 4K videos. You need at least a V30 speed rating.
Makes sense, thanks! I’ll get an Extreme card and update if the issue persists.
I’d recommend a Samsung card. SanDisk ones have failed on me after a year.
Thanks! I’ll go for the Samsung Pro Ultimate.
You need an A2 U3-rated card for 4K recording. A1 is good for Full HD, but not 4K.
Thanks for the heads-up! I’m ordering a Samsung Pro Ultimate A2 U3 card. Hopefully, that’ll do the trick.
Get the SanDisk Extreme Pro V30. That’s what I use in mine.
Thanks! Are you by any chance from Hyderabad?
Nope, I’m from Coimbatore.
Ah, got it. Thought you were someone else.
Welcome to the nightmare of SD card classifications!
They keep adding new standards, but it just makes things more confusing.
I wish it was simpler 
People are downvoting you thinking your card is fake, but I had the same issue with a legit card. A smaller, faster card might help.
Thanks! I’m sure my card isn’t fake—I got it from a reputable seller on Amazon. I’ll try an Extreme card and update if the issue persists.
Yeah, your card is too slow for 4K. Get a SanDisk Extreme or Samsung with 130-160 MBps write speed.
Thanks! I’m getting the Samsung Pro Ultimate.
SanDisk Ultras are slow. Even the Extremes can struggle. I recently got a Samsung Pro Plus 128GB—it’s fast and reliable. 150 MBps read and 120 MBps write.
Good to know! I went with the Pro Ultimate since it costs the same. Hope it’s just as good!