Organizing trainingdata for customized gpt?

The knowledge for my customized GPT is stored within 20-30 Word-Files and 40-50 Photos. which method/syntax/fileformats do you recomment? I tried to organize it as a leveled list (7 levels!) in main-file and at the end having a table containing file-names / path / description (as chatgpt proposed). I still want to learn to organize it more professional. Any hints?

@manuelito123 Try using chatgpt to consolidate your knowledge documents without losing meaning.

But how can I create - kind of - a refering filesystem? I can not even create Folders …