I’m having difficulty putting the chapters of a book into one folder for download onto the Amazon publication app. PLease advise.
Assuming your Operating System is Microsoft Windows, just use the Windows file manager (File Explorer?) to copy or move your files wherever you want. You can also create and delete folders. Right-clicking on a file name produces a menu of useful options.
How is that question related to LibreOffice?
It probably isn’t, of course, but the Questionner seems to lack experience and the question was easy to answer (approximately). Perhaps with more experience, the Questionner will become more aware of the rules and etiquette here.