From the Azure File Share standpoint you can enable logging of StorageWrite operations by creating a diagnostic setting. You can access resource logs either as a blob in a storage account, as event data, or through Log Analytic queries. This should give you an idea what what files are being written. For a list of fields in the log you can refer to this page.
I will let the FSlogix experts chime in from their standpoint. Hope this helps. Let me know if you have further questions or issues.
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I have tried following that forum solutions, from the logs created all I can see is stats of what is being written, I cannot see the actual data being written.
Would you be able to DM me for a support call please?
we need both azure storage and fslogix team help to analyze this issue. we can open a call ticket.we can refer below document.
How to open a FSLogix Support Request