How can an administrator deploy a new instance of Files?

Before upgrading Files or creating a file server, which component must first be upgraded to a compatible version?

An organization currently has two Objects instances deployed between two sites. Both instances are managed via manage the same Prism Central to simplify management.
The organization has a critical application with all data in a bucket that needs to be replicated to the secondary site for DR purposes. The replication needs to be asynchronous, including al delete the marker versions.

What is the minimum number of AHV nodes in a cluster required to use Objects?

An administrator needs to allow individual users to restore files and folders hosted in Files.
How can the administrator meet this requirement?