How can save data when gateaway offline

Hi I have Wisgate EDge lite 2. Nodes are sending messaga and gateaway pushing the TTN network. However, sometimes the internet may be lost. Therefore, the gateway should be able to work offline, saving incoming messages from nodes. When the internet comes back (online), the gateway should push the saved data. I thing you said ADR (automatic data recovery) but I cant see this feature on basic mode in gateaway interface at lora network section. at this topic there is an answer but it says packet forwerder. I really new one. I barely set up a network and started sending messages to Lora. I don’t know what a packet forwarder is. How do I set it up or is there no such feature in Basic Station?

Quick answer from a non-expert:

WisGate OS documentation

But I never tried it.

well this for packet forwerder. I am asking for basic station. ADR feature not seen on basic setup section if selected