Before you can start trying out the My Cloud OS 5, your device must be updated to the firmware 2.41.106 first. You can download the firmware from the links below. If you have important data stored on your current device, remember to back them up first before upgrading to the My Cloud OS 5 software.
If you need instructions on how to manually update your device’s firmware, you can refer to this knowledge base article
How to install the My Cloud OS 5 mobile app?
How to access the My Cloud OS 5 web app?
The My Cloud OS 5 web app can be accessed via https://os5.mycloud.com