感谢各位的回复和建议,因为不能连网太长时间,这里一并作答。
这几个月没法换电脑还着急用。电脑是好几年前的windows操作系统。我也觉得可能是临时文件占用空间,已经做过system ->storage - temporary files ->remove files (default selection, including Temporary files, Temporary Internet Files, Setup Log Files, Windows error reports and feedback diagnostics...