Search USB

Lately every hour Norton wants to search my USB drive if its plug in

Windows 10 

as test: thumb drive plug'd in three hours.  Norton prompt once on initial plug in. 

USB Drive Detected is new feature since 22.21.9.25
https://community.norton.com/en/blogs/product-service-announcements/norton-security-2221925-windows-now-available

USB Drive Scan -> On | Off | Ask Me

I've not tried leaving external drive plug'd in.  I'll have to test.
Maybe, Norton wants to remind re external drive plug'd in.  IDK
Maybe, new feature is buggy.  IDK

Does Norton prompt you each hour?