I am using Box Drive as my main storage location on my Mac, but am frustrated by having to download the same working files over and over.

Here's the pattern.  I am working on a project on my laptop that results in creating new files a folder on my Box Drive.  I shut down my computer.  When I reboot, the local files that I was working on are sync'ed to the cloud, but are not local on my computer and therefore have to be downloaded again.  I am often in places where I do not have great network connection (like on an airplane), and have repeatedly found myself not able to get my work done b/c my work (that originated on my laptop) is no longer local to my machine.

What is going on, and/or how do I change this behavior?