Hi @Whitney Kenny ,
You could use two (2) methods:
Method 1 - Use the Storage Migration Service
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With Storage Migration Service this will be done more or less automatically
https://learn.microsoft.com/en-us/windows-server/storage/storage-migration-service/overview
Method 2 - Create the file server cluster, and manually copy the data and configure the shares
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First you would need to deploy your two-node clustered file server, you can follow the official documentation here:
Deploying a two-node clustered file server
https://learn.microsoft.com/en-us/windows-server/failover-clustering/deploy-two-node-clustered-file-server
Once that is done you can start with copying the data for example with Robocopy from the old file server to the currently active file server cluster node.
The challenge will be with the file shares, you can follow along in the blog post below for more information on how to accomplish this:
https://blog.workinghardinit.work/2014/08/04/migrate-an-old-file-server-to-a-transparent-failover-file-server-with-continuous-availability
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Best regards,
Leon