Nope there is no "|random". "|notreuse" is option for resources in BAS.
You can use it without "|notreuse" but its meant for use in multiple threads,
so in that case each new browser instance will use different line from resource.
It looks like you are doing it in one browser instance, so you have to use "|notreuse"
because of that.
Other option is to use "File search" and read all files that neds to be
uploaded into list variable. Than you can use that list and extract needed
data (title - name of file), and upload according to data in the list, even
randomize it if needed.