Version 4 Gateways allow uploading and storing multiple versions of system firmware, so that you can easily revert to a previous version if necessary. As you install new system firmware over time, the accumulation of these old firmware files can take up a considerable amount of space on your device and may need to be removed manually. To remove old firmware files, follow the steps below:

Select "System > System Firmware Selection" from the Gateway's navigation tree.

Using the select menu, locate a previously uploaded system firmware version.

Once selected, a new button should appear beneath the select menu. Note that this button only appears on versions that have been uploaded to the device and are not the current version!
The "Remove selected firmware" button will not appear if you've selected "Factory default" or the firmware version that your gateway is currently running!