Installing to Laptop (VAIO), disk not seen

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I am trying to install Fedora 25 from USB to a Vaio T series that is presently running Windows 8.1.

The "install to disk" procedure does not see the hard drive(s).

The file navigator sees two hard drives, 500 GB and 32 GB, but cannot do anything with them.

The disks utility sees two raid hard drives, 500 GB and 32GB, and two raid devices (/dev/md126 and /dev/md127), but again, is not able to do anything with them.

So, how do I install Fedora to the machine?