How to put microsd card in yuntab 10 inch tablet

First is to check whether your tab has a 'microSD port' or not.

It might not be noticeable when you check on the body/edges/outer frame of your tab otherwise you won't be asking this question.

In this case, you may need to open the back cover of your tab (there has to be say a small part you can readily open to access the microSD port inside your tab).

Where none exists, probably, your tab does not support microSD card insertion.