Good camera with good quality, however it's SD compatibility is an issue, using a sandisk U3 64gb, receommended by Xiaomi, there are various slow card errors, various formats have been done and issue still persists

Basically, with 3 different SD cards,and the Yi 4K had problems saving files and would randomly have SD card errors.

I got multiple SD card read errors, no SD card errors and about half of my files were corrupted from strange reboots and freezes

First I tried it with a Samsung EVO Select 64gb card, but it gave me Slow Card error

SanDisk Extreme PLUS Micro SDXC UHS-1 Card with Adapter (SDSQXWG-128G-GN6MA)This card was recognized immediately, and without an SD card error, the first time I inserted it in the Yi 4K.

Well there's an issue out there where this camera will throw "Slow Card" errors and will prevent you from recording or even turning off the camera at times.

HOWEVER - if powering on the camera in 4K@30fps, the camera will come up with an SD card error, and take 20 seconds to sort itself out.

I get a "Slow Card" error all the time and as a result videos are often not synchronized video/sound and the video playback speed will fluctuate throughout the videos while the audio remains at the proper playback speed

i have sandisk extreme and pny microSD cards, and i would frequently get SD card errors when powering on the camera

Insert a card, as I did, and you may get an error message telling you that there is a card error.

I just had a slow card error then locked up yesterday while using their suggested SD card (need to remove the battery so it will turn off)

After a very brief SD card error message, was able to check settings and see it show up as 119.2GB of formatted space.

sd included in bundle gets a "Slow Card" error when shooting in 1080/60 which isn't even the highest capture setting.-"Slow Card" error causes videos to get corrupted, De-synced video/audio

I have the Sandisk Extreme pro 32GB, the Sandisk Extreme 64GB, and Lexar 1000x 64GB and these have all displayed the "Slow Card" error.

As soon as I power the camera on it beeps and says "SD Card Error" and then says "No Card" in the top left hand corner of the screen

i think 54 C is considerably hot for a camera of this type especially during longer usage duration

The camera is so heavily reliant on my smart phone that I'm confused as to why I don't just buy a 4k recording smart phone...

Always, the camera only has a few knocks which I will point out, not worthy of a loosing a

O cannot recommend this camera for anything.