Since ScummVM version 2.1.0, there are two new tabs in the Options dialog: Cloud and LAN (might be unavailable on some platforms).
'''NOTE: Currently supported builds from buildbot: stable-debian-x86_64, stable-osx_intel. Other platforms are coming'''
In Cloud tab you can connect to a Cloud storage. That allows you to sync save games and download game files from your storage. Right now only Dropbox, OneDrive, Google Drive and Box are supported. You can connect one account in each of those, but only one storage could be active at the same time.