Unable to remount to be able to boot without usb

Just completed a hackintosh for Big Sur. I followed the instructions using the open core by dortania. I am now just trying to boot without the USB, I was able to mount the USB and get the EFI folder but now it won't let me mount my HD. Using this https://dortania.github.io/OpenCore-Post-Install/universal/oc2hdd.html#grabbing-opencore-off-the-usb

Motherboard GA-Z270-HD3

Power Supply Corsair CX 750M

Graphics card- Nvidia Geforce GTX 1060

CPU Intel Core i5 7600k

SSD Samsung SSD 850 EVO 250

HDD Toshiba HDWH110

Memory DDR4 8gb 1200mhz

submitted by /u/cascas16
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