It’s not a good idea to include OS functions into application. We doesn’t have enough resources to make it robust as it done by dedicated teams which implements RAIDs. So, if you want - you can configure RAID and use it as a storage.
Take a look on these threads also:
The RAID, mail server, Telegram client, S.M.A.R.T. checker, etc. will not be part of the storagenode binary.
All those functions are implemented as an external services for the reason.
The storagenode binary should be small and effective to be able to run on small SOC systems like Raspberry Pi or even router: Running node on OpenWRT router?