No, it won't delete your drives.
No, it won't delete your drives.
I wouldn't rely on Windows for such things, as it might simply choose a "clean slate" for the user no matter their preference for any reason.
It's also wise to opt for a minimum of 256GB SSD when using Windows 10.
Ensure only one drive is connected during installation. It handles tasks independently, such as setting up the bootloader on another drive. Precautions are wise.