NiFi for backup solution

[Gop Krr]

Hi All,
I am learning NiFi as well as trying to deploy it in production for few
 use cases. One of the use case is ETL and another use case is, using NiFi
as a backup solution, where it takes the data from one source and moves to
another database|file. Is anyone using NiFi for this purpose? Does NiFi
support incremental data move?
It would be awesome if someone can point me to right documentation.
Thanks
Rai