How to handle art source files with Git LFS?

When using Git LFS with UE4 what are some of the different workflows to handle art source files that typically live outside the game’s project folder? (maya, photoshop, etc.).

It is my understanding that you would have a main folder for the entire project that you sync with Git. For example:

Main Game Project Folder (synced with Git)
Source Art (photoshop, maya, etc)
Unreal Project Folder

I’m syncing my Unreal project folder with git and using cloud for binary files/art sources. Haven’t found a good binary repo management for private uses (using Artifactory in business).

What cloud are you using for binary? dropbox?