File Uploads

I am in the middle of building a website and there are a few pages which there is a link to a PDF.
Thus far, I’ve just uploaded the files via FTP and then inserted a link to the files in the pages.
I will be handing this site to our client fairly soon and they aren’t that PC literate so I don’t think that showing them FTP would be a viable option.
Is there a way that I can upload a file to the website not using FTP? I don’t want to insert the file in a page or post, I just want to add it to the site so I can link to it later.

Thanks…