File Class = Database type where various attributes are defined.
File Class is applied to regular files only ie regular files are added to Database which are called here file Classs.
For databases related to files (where each row is a file and the colums are the properties of that file), i use DB Folder. For databases that do not have a dependency on files i use Dataloom.
DB Folder requires that each entry created is linked to a file. Sometimes i just want to create a database with contents and i dont want each row to be a link to a file. For this i use Dataloom as it does not force the entry to be linked to a note/file.