Can anyone recommend a product similar in nature to the initial beginnings of Dropbox - a client that syncs a folder to the cloud and allows you to access/easily share those files? Not just rsync or a command line thing.

I tried the Google Drive client for this (for Mac) and it was just a huge memory/resource hog, way worse than the initial DropBox client. But if someone just had "Dropbox as it was in like, 2010", that would be killer.