I just want to use SharePoint to upload files to it and downloading from it without getting into any add-in or whatsoever business(just for storage).
SPHostUrl but i have no idea what are these things and where to get them. So, would really appreciate if someone can enlighten me about simple concepts of SharePoint like authorization, uploading etc.
(Keep in mind i won't be building any SharePoint websites or anything else just bunch of ajax requests to read, write etc. to file system)