Hi,
Similar issue with my Hi8 (same specs as shown in your picture), but Android side wont show SD partition in Settings / Storage (there is option to “mount” SD, but nothing happens when clicked, just changes shade of colour).. it cannot even be found with root explorer (tablet rooted with instructions foundi in Chuwi V10 rooting -chain in these forums. The one with temporary CWM -session). Nevertheless Android notifies when removing card manually and Link2SD can use ext4 side of the card fine. Tried also ExFAT, FAT32 and NTFS but these partitions are visible only on Win 10 side.. tried to find info from these forums and via search engines with no luck. Anyone got any idea how to make this work? Many thanks! and hopefully this wont distract the thread you made Raqtor.