How to edit text in cart in header

I would to edit the text in the header cart in storefront:
'X items'
Where can I access this? Can’t find it anywhere in storefront or woocommerce files. I can see hook in header/php:
storefront_header_cart
but can’t find any function for this in other files?

I would like to remove the dropdown when you hover over it too. Where can I change this?