A: if you think that .DS_Store files are garbage files, then system would produce them—however, in fact, the beginning files are all system files which are hidden. Unfortunately, because of system reasons, in Windows, they are not hidden, and as Windows could not open and check the name, so you have no idea what they are, so many people think they are garbage files. But definitely they are not. So please attention, except this, system would produce some cache files (called temporary files), which are different from the ones disposed in Windows. As in Windows, they would be deleted all when restart (when log off, most cache files would be cleared, but part files connected with bottom cache files are unable to be cleared.), so there’s no necessity to worry about what problem would occur.