Answer by user1133275 for Fedora 29 -- 500gb Hard Drive only storing 52.6gb

If you look at the output of

pvs
lvs
vgs
pvdisplay
lvdisplay
vgdisplay

You will see where your ~450 GB is.

Depending on the output of the above you can then resize with something like

lvextend -L 100% /dev/vg/root