Where did 100 GB from hdd go?

Question

Iron

Disk size: 465 GB
Windows shows a capacity of 360 GB
Acronis Disk Director does not initialize it at all :(
Windows 10, one partition, I am writing from it now. What is this?

Answer 1

This is a sacrifice to Asmodeus.
Most likely, somewhere there is an unallocated weaving, try to boot from a disk with Windows, something like Windows PE (it seems to be called that) and redistribute the space using additional programs. If you format when reinstalling, it will also be possible to restore.

Answer 2

LiveCD with Acronis/Paragon etc. will answer the question