I have some problems with a Sandisk Extreme 64GB microsd: if I put it inside my smartphone (Asus Zenfone 2, whose specs say that it supports sdxc up to 64GB; its operating system is Android 5.0), it is correctly mounted, but but after some time, say around one hour, I get a notification icon saying that the card has been suddenly removed and I have no more access to the microsd.
If instead I put it inside another smartphone (Acer Liquid E2, with Android 4.2.2), it works correctly. In order to check that the problem is not on the Zenphone 2, I have put inside it a microsd Samsung 32 GB class 10, and there are no issues with this microsd.
I have also tried to format the Sandisk microsd in exfat filesystem on my pc using SD Formatter 4.0, but witn no improvements.
Can anybody help me?