SD Card not being recognised on Android HIPad Max

New HIPad Max tablet, bought 256GB sd card, added content. Only once has card been recognised thought it works perfectly on 2 other laptops.
Going to Spain on Tuesday, Tablet nwo waste of money

I have hi pad max. Max size sd card is 128gig,
If larger it wont recognize it.

Yes as @Kbar8371 said only supports max 128GB

This because the tablet OS doesn’t have support for exFAT format, SD Cards/USB with 64GB or larger always will format in exFAT.

To fix this, you might need to reformat your SD Card to FAT32 to tablet can access it. You can try GUI Format FAT32 on Windows. Make sure to backup your files before use it.