To my recollection. they are Sandisk. they are 64 gigs. I have two cameras out of buying 4 (still need to set up the other two) they are the yi exterior type with usb power cord plugged into 110v house power. All camera features of the cameras work fine …they just do not want to record anything on the SD cards …although they do recognize the cards. In the app they show them in good condition and also recognize the gig capacity/memory. I have also reformatted the cards multiple times via the app.
I should also mention the cameras are a couple of years old and have been working fine , up untll lately not being able to record on the sd card. It’s Strange. It seems the network can’t connect when the camera wants to record in the SD card …as it just keeps cycling …hence the unavailable SD playback when prompted.
To be honest …yi seems to have many set backs in my experience …although i do like them …but it seems it’s getting worsts , especially now that the cloud pat service is present, but i could be wrong. Hopefully you will be able to get me going again …as they have exonerated me on two car thefts. So please help me resolve this.