I’ve never installed fedora specifically but…

Anyway I created a free 900GB ext4 partition

It’s either ext4 or free, can’t be both. Now, if it was ext4, Fedora would for sure detect it as such, so I’m not sure what it is.

I assume you would want to click on sda6 in the installer, then the “-” button to delete whatever is there, and then it would recognize it as available space.

Check my other comment. sda6 is there.

sda6 is the fourth one (after sda3) in the list on the bottom picture. The partitions seem to be physically in that order, but labeled differently, as they were created. You can reorder the labels but it’s also fine left alone AFAIK.

Any self-respecting distro pushed an update to fix this days ago, so just updating (and restarting cups) will do. But if you don’t print anyway, you might as well disable it.

deleted by creator

In this case definitely the first. Just make a new directory (name doesn’t matter: SATA, Files, data…) and use your distro’s tool to change the mount point (Disks on GNOME and derivatives, or just edit fstab yourself)

You can just mount it in a folder in your home directory. This is not a weird thing to do.

I too had an NTFS partition at first. Definitely not great, since it trashes your file permissions. I was glad to be rid of it when I binned the other OS.

Arch + Cinnamon is neato!

Yep. Would be pretty bad software otherwise. Best to set it up so it keeps one monthly, one weekly, and 2-3 daily snapshots. Then you don’t even need to think about it, and it deletes older ones automatically. You can still do manual snapshots, and it won’t delete those.

Why does this look and sound like the inspirational scene of a Mockumentary?

If you have the space (on a different drive, preferably) you could use Timeshift to create regular snapshots of (parts of) your system. You can restore deleted files like this from even months ago, if you configure it like that.

The first snapshot takes up as much space as all the files you want to save, but every following one only uses as much disk space as the new/changed files since the last snapshot.

Proton can run any Windows-only game on steam, you just have to enable it in the settings. The ones for which you didn’t have to enable this either have a native linux version, or are officially supported in Proton, and should run very well. The other games may have more issues, but even those might work excellently out of the box.

I prefer a distro with a nice name

That’s honestly a really good distro picking strategy for someone just moving to Linux.