As far as the legislation is concerned there is no inherent difference between goods, services and data.
You own the car, you own the media on which the data is stored, you own the data. You are entitled to assume that the system as a whole will perform as advertised. If it doesn't you are entitled to redress.
You own the computer, you own the media on which the data is stored, you own the data. You are entitled to assume that the system as a whole will perform as advertised. If it doesn't you are entitled to redress.
The fact that you owned the computer before you purchased the data is irrelevant, you are purchasing data which will be used in conjunction with your computer to form a system.
What you don't own are the ideas and source code which are used to prepare the data, the intellectual property - this can be described as a license, the data itself is treated as if it were a physical object or a service.