I want to renew my old Ubuntu 16.04 with Ubuntu Mate 24.04. I have a dual boot partition with Windows 7 and Ubuntu on the PC, so I made a bootable USB with MATE on it and proceeded.
At some point he asks me "How do you want to install Ubuntu MATE?", so I choose Manual installation and it shows me the Manual partitioning window, as the photo shows.
Since I don't want to lose the bootloader nor the Windows partition. Can anybody please help me to go forward with the installation? I looked up in many answers to similar questions, but I'm not an expert and I don't want to make a mess.
