File Manager

Is there a tutorial (youtube/video) showing how to use File Manager. The online documentation is too dense for me as a beginner.

This page?

What are you having trouble with specifically?

@bertabcd1234

I cannot figure out how to create a file, update the file, assign data fields in a file record. I would like to create csv file to replace what DMD produces.

You have to create the file oitwide Hubitat, then use the File Manager interface to upload it--unless you happen to be working with an app that can do some or all of this for you. I'm not sure what app or service you're describing in your post, but any natige Hubitat piece should be documented. I just suspect there's more to this in your use case...