[SPI interface] USB is not detecting and Prints as Attach flash drive first!

[embhobbb]

I am using Arduino Uno borad and CH376S USB host module. And I have connected with SPI interface as shown in the following figure. I didn't connect INT pin.

I was trying basicUsageSPI example but didn't work for me. On serial it was printing like as

*************************
Attach flash drive first!
*************************

Any suggestions?