My parents are fed up with windows 11 slowing down their old HP desktop to near unusable levels. It is so bad that the right click menu can take up to 6 seconds to load. Anyway I created a free 900GB ext4 partition that I want to install to but how do I get the fedora KDE installer to detect that free space (sda6)?
It looks like you’ve created a partition for Linux - you need to delete this partition. Leave it as “unallocated” or “free space”. Then the Fedora installer will see it as space it can install to. The installer will handle creating the actual partition.