Hi Kayathri,
The KSDK 1.3 has provided the USB Host demo for the FRDM-KL46Z board, you can these demos in the ~\KSDK_1.3.0\examples\frdmkl46z\demo_apps\usb\host after install the KSDK 1.3 and please go for download through the link as below.
Software Development Kit for Kinetis MCUs|NXP
Have a great day,
Ping
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