OS not append updates

The first time Kali Linux VB download is 3.75GB of its size.

I have not install any other external tools in my kali machine. I was just giving the apt update as a regular. Now my Disk Space has been 16GB.

Now, I have downloaded the new VB.
Total updates are just inside 4GB, but it is not the only append for the stand-alone machine to be updated.

1. Why this happens?
2. How to prevent this?

The images are kernel 5.17 the updates are to kernel 5.18 so lots of other things need to be updated as well