Problem with recording 4K on sd card

[Milauski]

I just bought an FDR-AX33. I had micro sd card(with adapter) before - it's Samsung PRO 64GB microSDXC (https://www.cameramemoryspeed.com/reviews/sd-cards/samsung-pro-64gb-micro-sdxc-memory-card/).

Camera refuse to record in 4K with the highest quality(100Mbps) - it says "Cannot record. Please use UHS-I U3 compatible memory card"

Problem is that my card should be good enought, it is UHS-I and U3. Minimal writing speed is 30MB/s so its still about 2 times more than needed, 100Mbps it is only 12,5MB/s, right?

Any ideas what I can do? Beside buying new card  

Thanks for help

[Anonymous]

Hi there,

Have you tried formatting the card?

Best wishes,

M

[Milauski]

Yeah, I tried to format by using camera, nothing get changed 😞

[ioagount]

Hi Milauski .

I use this SDXC (https://www.kingston.com/en/flash/sd_cards/sdr) for my FDR-AX33 and have no issues.

Before you buy a new one, check the following things:

1) Be sure that your card uses the exFAT file system that allows recording large files.

2) There is a possibility that your card is a counterfeit.

3) Update the firmware on your camera.

Let us know what happened.

-John

[MrDeanoss]

I would think that the issue is because the card you have is only a class 3 .. basically the card cannot write the information quick enough when you are recording.  Get a class 10 card. You can tell this by the number 10 encapsulated in the letter C on the card or packaging. My camera won't record DV video on a class 2 card for the same reason...I put in a class 10 64gb card and it's perfect. Hope this helps. 

[IamNic]

Hi all,

please don't quote the "old" speed ratings (which still use "class") but go for the "new" so called "V"-rating which was introduced for video usage.

In this case get a card with a "V30" rating.

- Nic

[AndyLupescu]

Hi,I got Sandisk extreme pro U3 class 10 and it also has a V30 mark on it,and it works perfect with 4k!

Also,plese test your card with H2testw to see if it's fake or not,but 100% you'll need a different card!

[IamNic]

Hello @AndyLupescu,

I agree - always test new cards to verify you received a genuine one.

For Sonys 4K camcorders all genuine V30 SDXC cards should work.

- Nic