I’m also having the same SD card issues – SanDisk Ultra SDXC 64 Gb, been using it for a couple of years in a Samsung S3 phone without any problems. It works fine in an Asus Windows 10 laptop, but not a peep out of the cube when I insert it. I’ve tried reformatting to NTFS and ExFAT, also have done a full write test. I’ve also updated the driver, deleted it and reinstalled it etc. Nothing seems to help…
Any other ideas much appreciated! Thanks.