Every tutorial I see about installing entware describes a process where you are required to format a drive to ext4. If I already have an attached ext4 drive that I am using for file storage, do I still need to format this drive to install entware? Is the formatting process also partitioning as well? If so what are the required partitions? I am trying to get around formatting this drive as it already has all my files on it. Any help is greatly appreciated.