I recently started using Avast Security for Mac on a new MacBook Air. I attempted to set a daily scheduled scan, but I've run into an issue where even though I set the scan not to target "mounted removable volumes" or "mounted network volumes," my external USB-connected hard drives are still being scanned. This is a bit problematic as they're very large, and while occasional scanning may be a good idea, I don't really want a 12+ hour scan on a daily basis—and that's exactly what I'm running into while they're connected.
Attached is a screenshot of my scheduled scan settings.
Any advice on how to fix the problem short of making sure they aren't connected when running the scan, or running the scan manually, would be appreciated.