i have sdcard thats 16gb. Main problem is that on my phone it tells to format card and it fails to format (phone meizu m6) but it works fine on huawei p20 lite. Besides that i have videos and photos uploaded to tje card but when i want to see the data inside in a card it says that its in.wrong format. Amy ideas?
Maybe you have not SD, but SDHC card. And your phone(meizu) works with SD cards only and that is why simple SD card doesn’t work. And huwaei works with SDHC, that is why it works well. That is only a theory, but maybe I am right 
