You are attempting to install ownCloud on your Datto appliance, but the link to install ownCloud is not visible in the appliance's web interface. Normally, the Get ownCloud link would be in the upper right hand corner, as shown in Figure 1.
Figure 1 - Get ownCloud button
OwnCloud is only available on SIRIS appliances that are running Ubuntu 12.04.
If the SIRIS is not running Ubuntu 12.04, you will see the message shown in Figure 2.
Figure 2 - Ubuntu Upgrade Banner
If that banner is present, you will first need to upgrade to Ubuntu 12.04 by clicking "Upgrade your device's operating system." You can find information and instructions in the article Device Upgrade to Ubuntu 12.04.
If your appliance should be able to run ownCloud, but does not display the link to do so, please contact Technical Support. We may need to manually install the ownCloud package.