I am trying to install Ubuntu 24.04. Since I have a windows partition, I chose the manual partitioning. I must choose a drive to install the bootloader. Two drives are listed: my hard drive and my usb stick. Obviously, I want to install the bootloader on the hard drive but it is grayed out and I can only select the USB (see image).
On my hard drive, there is a partition of 104Mo that I indicated I want to use as /boot with format VFAT. I thought maybe it was too small but even if I put a larger /boot VFAT partition, the hard drive is still grayed out... (I will also use sda6 as my root partition but when I set it does not change anything)
I installed several times ubuntu and it is the first time that I face this issue... I have no idea what could be the problem.
Could you tell me how to fix it?
EDIT: As suggested by @user68186, deleting the root and swap partitions on the live USB using gparted before the installation made it possible to select my hardrive for the bootloader.
Edit adding the parted screenshot: