Fast one-way sync between two folders in windows 10

Question

I am wondering what's a fast one-way sync of two folders in windows 10. One way sync means that changes in files or additions of files in Folder 1 are pushed to folder 2, but changes and additions to Folder 2 are not pushed to folder 1. In Windows Toy Sync these features are called 'echo' or 'contribute'.

Windows Toy Sync doesn't fulfil my requirements because you have to manually sync each time.

Dsynchronize doesn't quite fulfill my requirements because the sync is too slow. I think it checks for changes every 5 seconds, which is better than Windows Toy Sync, but I need something more instantaneous.