You need to use media creation kit under your windows 10 to create a bootable image onto your sandisk flash drive. Launch windows 10 media creation kit program under windows, follow steps and select target USB flash drive, once finished you can proceed rebooting your PC from the created windows 10 bootable installation image.
-How to install Windows 10 from USB with UEFI support :
1.How to create a USB bootable media using Media Creation Tool
2. How to create a USB bootable media using Rufus
>>https://www.windowscentral.com/how-create-windows-10-usb-bootable-media-uefi-support
If you're having trouble with MS windows 10 media creation kit you could try RUFUS >> https://rufus.akeo.ie/