It would be great if it were possible to upload large files directly from an external hard drive to the Dropbox servers using the Smart Sync tool or another tool. I'm a filmmaker trying to get video footage to a remote editor and am currenltly limited to uploading only what can fit on my computer's local drive at any one time. For projects with more footage than I have space on my internal hard drive, this means I have to painstakingly bring footage folders onto my internal drive and upload one by one as space allows. Would be awesome to be able to upload these large files, which can be hundreds of GBs each, directly from an external drive to the Dropbox servers to share with collaborators. Cheers!