Update: I've deleted Windows and reset BIOS factory settings and the problem persists. This is no longer a dual-boot specific question and has been updated.
I'm trying to install Linux Mint on a Dell XPS 13 9350 with no installed Hard Drive. I also tried Ubuntu with the same results, but I'll talk specifically about Mint in this question as its my desired distro.
I have added Mint to an 8GB USB stick via Yumi. I reboot the machine and hold down F12, then choose to boot from the USB.
A second screen allows me to "Start" Linux. I start it, and then begin installing from the install icon on the desktop. After being asked about language, keyboard and WiFi I'm told that I only have 10GB of space, which is not enough to install. It appears to be trying to install on the USB drive, as this is a 256GB hard drive.
NAME FSTYPE LABEL UUID MOUNTPOINT loop0 iso966 Linux Mint 19 Cinnamon 64-bit 2018-06-26-15-38-36-00 /cdrom loop1 squashfs /rofs sda Ｌsda1 vfat MULTIBOOT 190... /isodevice nvme0n1 Ｌnvme0n1p1 ext4 16639...
I have manually toggled "RAID On" to AHCI in the BIOS and that allowed me to complete the Linux install wizard, but gave me a Dell Support window message on boot about a missing OS. Since then I have reset to factory BIOS settings and I get a "Missing Hard Drive" message on boot.
What can I do to both install and boot up Mint, now on a computer with no OS?