We are in the same boat. I updated from My Cloud v04.05.00-342 to Synology DS718+. As you want to continue using your My Cloud, you may want to read this topic where I describe a way to do it:
In the topic, we discuss:
How to use Synology VPN Server and how to get remote access to My Cloud.
How to easily copy or move files in shares to a new Synology NAS.
How to play music and watch videos stored on My Cloud, also from a remote connection outside LAN.
