I am trying to find my Profiles folder in my plex media server on my local files system. I am trying to add flac support for IOS through the xml go around but i am unable to find them. any suggestions?
C:\Users<username>\AppData\Local\Plex Media Server\profiles
Any changes you make in this folder will get overwritten when the next server update is installed.
You can however copy a profile from there to C:\Users<username>\AppData\Local\Plex Media Server\Profiles and make your changes in there.
(You will have to create the Profiles subfolder yourself.)
Please keep in mind that your changed profile will override the default profile.
But the client itself can and will ‘augment’ this basic profile at run time.
You may also later need to remove or adapt your customized profile if Plex server brings updates to the basic profile.
As long as the iOS device is in the same local network with the server, flac files should get played as-is (i.e. without transcoding, full quality).
This requires a relatively current server software version and the use of iOS 11+
Remotely, there may be a bandwidth restriction in effect. Take a look into the Settings area of your iOS Plex app.