For the a7C II I’d stick to UHS‑II V60 SD cards as the “sweet spot.” They’re fast enough for basically everything the camera does (including high-bitrate video and long bursts) without paying the premium for V90.

Good picks:

• Sony Tough (SF‑G series) V60
• SanDisk Extreme Pro UHS‑II V60
• Lexar Professional 1667x / 1800x V60
• ProGrade V60 UHS‑II

If you only shoot stills/light video, a good UHS‑I V30 works too, but you’ll notice slower buffer clearing.

I've been using the Sony a7C II for a couple of months now, and my go-to SD card has been the SanDisk Extreme Pro V90. It not only handles high-resolution 4K video with ease but also offers excellent reliability for extended photo shoots. I recommend getting one with at least 128GB if you often shoot in burst mode or record long videos. Just make sure you buy from a reputable source to avoid counterfeit issues.

Lexar Professional 1066x cards are my go-to for the a7C II. They're usually a bit cheaper than SanDisk but perform just as well. Make sure whatever you get has V30 minimum if you plan on doing any video work. I learned that lesson the hard way when my older V10 card started stuttering during 4K recording.

No way, I literally just dealt with this yesterday. Small world.

Any UHS-II SD card is recommended.

SanDisk Extreme Pro UHS-II V90 SD Card is recommended.

Yep, this is the way

For 4K video on the a7C II, prioritize a UHS-II V60 or V90 SD card. 128GB+ is a good starting capacity. While V90 offers higher theoretical speeds, V60 is often sufficient and more budget-friendly. Reliable brands include Sony, SanDisk, and Lexar. Check reviews for real-world performance.