Hi, I have a new MacBook Pro retina 13 inch. For some reason, every time I modify and save a file, the System (Yosemite) creates these Zero byte files with random names of letters and numbers in the source file. It's rather unusual, and when I go to delete them, it says they can't be deleted because the source file cannot be found. I use Dropbox a lot, so I'm thinking maybe it's connected to the way Dropbox interacts with the system files. I'm not sure. Or, maybe it's the system itself. I attached an example image of what it looks like. The top 3 files are what I'm talking about. Any advice is appreciated.