I've got a 64GB sandisk microSD which, using the SD card creator with OpenELEC 5.0, I can get to boot and work with no problems on the Wetek Play. However, if I try any of the LibreELECs, it does not boot. Furthermore, if I try to update OpenELEC 5.0 to any version of LibreELEC (again, installed on SD card), it stops booting.
Using the NAND build works fine to install onto NAND.
On a separate note, is there any way to put /storage on an external drive on Wetek Play? I'll create a separate thread for this question, though.