@Elisha George
We do not have a specific guide on migrating your AFP shares to Azure Files. To migrate we would recommend first migrating from AFP to SMB. Once migration to SMB is done you should be able to use RoboCopy to migrate your SMB share to Azure.
Hope this helps. Let us know if you have additional questions or concerns.
Resources:
Apple AFP to SMB migration
Use RoboCopy to migrate to Azure file shares
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