Free space problem

I tried to install Kali linux from USB to acer helios. My currently OS is win10. When I increase persistent size rufus didn't work DD mode and Kali not mounted. If I don't choose persistent size DD is mode is work but then I couldn't find free space in installation page on Linux. My BIOS mode UEFI even I choose from rufus UEFI mode I couldn't find free-space. Please help me I have been trying to fix this for 2 days. My usb is 32 GB.
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