Backup Structured Data and Unstructured Data seperately in SQL Server - Is it Possible? Can I get some inputs on below:

SQL Server Version : 2014 SP2 GDR with AOAG environment.

Is it possible to backup Structured Data &amp; Unstructured Data (FileStream) separately in SQL Server ?

For structured data backup, I am reading about the partial backup to exclude FILESTREAM file groups.

If backup Structured Data &amp; Unstructured Data (FileStream) separately in SQL Server is possible , can I restore Structured Data &amp; Unstructured Data (FileStream) separately ? How to restore FileStream data alone ? or structured data alone ?
No, there's no such direct feature. You would work at the filegroup level, and at that level SQL Server doesn't care whether it is a filestream or something else you have in that filegroup. 

And when you restore a part of the database, you need to have the primary file group (since this contains all metadata) and whatever other filegroups you want. The non-restored filegroups will be "defunct", and will forever have those "ghost" filegroups hanging around (there's no way to delete/remove a defunct filegroup).