When using TUniFileUpload
Create your own folder do not use UniGui.LocalFilePath, ie. DestFolder:=UniServerModule.StartPath+'UploadFolder\';
Copy file to UploadFolder from UploadComplete to CopyFile(PChar(AStream.FileName), PChar(DestName), False);
Please change direction of slashes from \ to / and use HTTP url format and read http://{url}/Uploadfolder/FName . url should be manually defined to allow domain name in future etc.