Using 128 GB with new Raspberry Pi to allow additional modules

I am new to the Raspberry and this software. I am working with a School District in Zambia to provide laptops and other learning tools. We are looking at installing the Rachel software and Raspberry Pi for off-line access.

Is it possible to use the 128 Gb micro SD for this application. I want to be able to add modules as we go forward with this project.

Thanks for any suggestions,
Ed Valentine

No problem, Learn to manipulate and configure Rachel Pi myself