An Introduction to 롤듀오
https://www.evernote.com/shard/s365/sh/fcca38a2-cb67-4b18-b8ed-df26fc9e8914/94db06337d9d01145932e76c0e7d22d1
This process at times is often irritating when you're in the middle of a download as well as user indications off before the down load is total.