“This disk doesn’t use the GUID partition table scheme”

‏-Lenovo v330-15IKB (laptop) -Trying to duel boot windows10(already installed) and macOS (managed to get into the installer) on two separate partitions both under the main MBR disk. *saw on YouTube some guy managed to get duel boot on this specific laptop. But I believe he has more than 1 disk.

The error happens when I select the drive to install macOS in (installation through the usb). I know the error is caused by the main disk in my laptop not being in GPT (guid partition map) format, but I don’t want to lose the data in my windows partition by converting it from MBR to GPT (also I don’t know how). Is there any way to change format without losing data? Another concern of mine: I can see in my bios it’s booting legacy & and I saw on the internet GPT isn’t fully compatible with legacy- still a good idea? I’m afraid I’ll break my device lol. still I made a backup. ‏Thank you guys‏

Author: @Grippyschnitzel