Hello! Yesterday I used a bootable usb to try out Manjaro and I really liked it, but when I tried installing it the only place where I could install it to was the bootable usb despite me having two drives showing normally in Windows 10. Thank you in advance!
Welcome at the forum, @cPrism!
Secure boot disabled in firmware?
Fast Boot disabled in Windows?
Windows installed in UEFI or legacy mode?
Disks formatted in msdos/MBR or GPT?
Windows fully shutdown or only suspended?
What ISO was used for the live stick?
Have you checked its signature?
In what mode the ISO was booted (UEFI/BIOS)?
What system do you have?
Answers to these questions could be helpful to help you.
Also, if you boot the USB stick, please provide output of
inxi -Fxxxza --no-host sudo fdisk -l lsblk -f
Perhaps setting the sata controller to AHCI in your firmware settings relsoves the issue.
Secure boot is disabled and so is fast boot
Windows is installed in UEFI
I have KDE Plasma on the usb stick
I don't really know what the rest means
When I click on Select Storage Device it only shows me the usb with no option to select the drives
Did you try to run the partition manager alone ?
click on the menu and type "part" the first one is the partition manager
If you don't know what "the rest" means, here are some detailed instructions to follow to give us a bit more information on your system:
IOW: you need to help us help you...