What you describe is the "vendor lock-in". If you only store some files on gDrive you do not have a lock-in. But If you built a product on top of their api then

What you describe is the "vendor lock-in". If you only store some files on gDrive you do not have a lock-in. But If you built a product on top of their api then you have to invest something if you want to move to a different vendor. That's why I usually try to stay on simple vServer with some open source software or at least some bought software.