So I am wanting to get an AWS server but have the ability to add volumes as needed. This helps lower our costs per month with server companies.

I am wondering how would I add additional storage space and how centova would manage this?

So I am wanting to get an AWS server but have the ability to add volumes as needed. This helps lower our costs per month with server companies.

I am wondering how would I add additional storage space and how centova would manage this?

I think this is what you searching for: https://centova.com/en/faq/cast3/customizations/can_i_move_my_media_files_to_a_different_path_or_partition
Based on this you can also mount an single user and so on. But this based on your knowledge.