Backup
Settings → Backup → Save a backup. The file holds your subscriptions with their links, every server with its keys, routing with rules, DNS, settings and the selected server. It is encrypted with your password (Argon2id + ChaCha20-Poly1305); from the outside it only says it is a Commy backup.
Left out: the device identifier (a new phone is a new device to your panel), traffic history, logs and rule-set files — those download again.
Restore from a backup replaces everything you have, after a question that says how many subscriptions, servers and rules the file holds.
The password cannot be recovered. The file holds the keys to your servers: choose a long one.