How can I install OS 5 when I’m currently on v04.06.00-111. I can’t access the device via mobile right now.
No you cannot upgrade/update to v5.x firmware. OS3 first generation single bay My Cloud units running v4.x firmware cannot be updated to OS5 firmware.
Devices Available and Supported for My Cloud OS 5 Firmware Upgrade
Q: Will my device stop working if I can’t upgrade to My Cloud OS 5? Will I lose access to my data?
A: After the services are shut down, you can only access the device on a local network. Access through the My Cloud OS 3 mobile app or web app won’t work. Email notifications won’t be delivered. Devices that had auto-update enabled received a final firmware update that disabled remote access and outbound traffic to cloud services. Now, support has ended and you have to use your local network to access your device.
