I am the developer of Syncovery and was told I could announce it here. Syncovery is a commercial backup and sync tool with support for many protocols and cloud APIs. It runs directly on the NAS and has a web GUI for job configuration, status monitoring etc. It supports many advanced features such as uploading compressed and encrypted files without using temporary files on the drive. You can check it out on www.syncovery.com, and the WD packages are available on this download page:
Download Syncovery, a Great Sync and Backup Tool for WD (Western Digital)
The downloads run as a 30-day trial period and can be unlocked permanently with a license code which can be ordered from our web site.