question about Sd Card!

hello peeps!

im pretty new here, i just got my one R twin edition 1 week ago. im trying to start a vlog project so the 32gb sd card that came with the cam didnt gave me enough time tho, so i decided to buy a 256gb Sd... heres my story... lol

so i bough a SanDisk extreme V30, A2 , C10, UHS, 160/90MBS. So is the one tha the insta360 team tell you that work on the cam, so after connecting it it appears pretty fast that i had12hours of recording then blinked and went down to 6hrs, i mean even 5hours would be enough for me, so after making a shoot it gave me a message that said ''Sd Card is Slow'' something like that, lol i mean... i bought one that have the specs that are the optimal, ok then i formatted it on my pc, after that i connected my bone conduction headphones as ''airpods'' so what happened is that my voice sound like chipmunk lol and the video when it hit 8 seconds gives again the SD card is slow error, if i dont connect the headphones i can record more than 10min that i had tried...

any solution on this?

Thank you in advice.