You can name files and folders just about anything you want. Feel free to use spaces. You can not use certain characters such as .,:or /, but it can be pretty long. Be creative and assign names that will be meaningful to you or others at some time long after you have forgotten. Don’t get carried away though. Very long names will cause problems in lists. Think of this as a filing cabinet with folders. Organize your stuff so you can find it. There is no limit as to how many levels of folders within folders you can have. All your stuff should be stored within your Documents folder, but you can have as many folders inside that folder as you wish.