Minix U1 SD card

Hi, I have 2 Android TV box’s, a dreamlink T2 and a Minix U1 and I can’t seem to get my SD Kingstone 128 or my Sandisk 64 Ultra card working. Both cards work ok with the T2, but in settings/Storage the cards show as a grey bar with no content, and the only option is unmount. Both cards show up ok in ES File Explorer. I want to use to card for installing apps and for recording with IPTV Smarters.