how to protect our data from copying

Hi,

thanks for your question.

I’m sorry that I have to disappoint you here, but preventing content of a website from being copied is not possible (so, this is not a limitation in TablePress or in tables, but for everything on a website). If content is on a website, it can be copied. That’s just how it is.
You can however try to make this more troublesome, e.g. with a plugin from https://connectwww.com/3-best-wordpress-plugins-to-protect-your-blog-from-right-click-text-selection-image-dragging/1030/
But this will not stop someone who really wants to copy your content.

Regards,
Tobias