How to get memory back after an unsuccessful windows installation via boot camp?

Question

macOS

Installed windows 10 on macbook pro 2015, an error occurred (did not touch anything during installation, windows was downloaded from the site). After that, all the allocated space for windows (70 g) just disappeared. Who faced this, how to return?

Answer 1

I put Windows on the hackintosh like this - the allocated space also disappeared, I don’t understand where, but it was a feature of the hackintosh
, you definitely have a macbook?)

Answer 2

The place is not gone, it has become an "unallocated area".
You can verify this using Disk Utility.
Without "erasing" all the information by standard means, it will not be possible to return the place. Is it possible to create a second 70 GB disk from free space :)