The IPFS Node subsystem is responsible for receiving the file memory request forwarded from the left HTTP Service and saving the corresponding file data to the IPFS Node node pin for saving. When the Vault data is backed up, the IPFS Node will also receive and back up the data exported from the Vault, and at the same time synchronize the backup data copy to the corresponding Backup service through the IPFS Network to ensure the redundancy and recoverability of the vault data.