IXpand Flash Drive

I purchased a 64Gb iXpand Flash Drive to enable me to completely backup my iPad Pro.

I am a musician who keeps 600 lyric reminders in iOS “Pages”.

in the event that my iPad goes “down” I need to be able to restore All the Pages files quickly.

On some occasions there is no Wi-Fi on stage or in the dressing room, so downloading from the Cloud is not an option, not to mention too slow on such an occasion.

The iXpand does not allow my to backup Pages documents to it.

Could you please suggest a solution.

Many thanks

Kevin Hamilton