How do you handle data security and privacy in the cloud?

I have a SME which I have just started and am actually looking to get cloud services as from what I know cloud is amazing! Files on-demand, anywhere access, and scalability for businesses. But with great convenience comes responsibility, especially when it comes to our data. So, do we keep our information secure and private in the cloud.

Adding on to that we are a company that is based in India and I want my Data to reside within India. I do not want to depend on external providers like AWS & GCS.

Can you suggest something suitable for my requirements. I need something at cheaper prices too.