I've used Evernote for years to archive documents, but only recently discovered that it could be a viable place for storing nearly all of my working files as well. What brought me to this realization was learning that a document attached to a note in EN can be edited, for example, in Microsoft Word, and the changes will be saved to the version attached to the note. I had always (mistakenly) thought that changes to a note's attached document would need to be saved to an OSX or Windows folder and, then, dragged back to EN.
I am now using EN as a replacement for storing virtually all of my working files in folders (and subfolders, and subfolders of subfolders, etc.). The beauty of this, of course, is that the working files are now available for editing on my multiple computers.
There are those who will argue that cloud drives such as OneDrive and Google Drive can accomplish the same purpose. To a point, this is true, but EN's ability to quickly and easily grab information from anywhere using virtually any device surpasses any method I have found to accomplish the same thing with OneDrive or Google Drive. Then, too, while EN's search capabilities could always be enhanced, it is still superior to most of the other methods I have found for doing the same thing through Spotlight, etc.