While start9 does offer the easiest LND backup with a click the backup does not contain channel .db which is apparently deliberately by design because restoring a stale channel database is how people loose everything. If you broadcast an old channel state, your counterparty can claim ALL funds in the channel as a penalty. Start9 only follows Lightning labs guidance.
On the start9 LND backup USB you have:
-your on-chain wallet (Aezeed 24 words seed)
-the static chanel backup(channel. backup) this is the channel funds recovery mechanism
-Config, macaroons, TLS certs and watchtower settings
The recovery works in a way that after restoration, LND automatically runs SCB recovery, which requests force-close of every channel. Your channel funds then come back on on-chain after the close timelock expire(many online sources mention it can take up to 2 weeks but my experience with Megalith was not even an hour)
In simple terms a restored node is a recovery tool, not a node you keep running.
Something you realize only when you experience it 🥴
