紧凑的cmd线不工作

Question

我想压缩一个13 MB的文件。我运行以下cmd并且它成功（我可以告诉）但没有新的zip文件出现。

D:\>compact D:\myfile.bak

 Listing D:\myDir\
 New files added to this directory will not be compressed.

 13728256 :   4874240 = 2.8 to 1 C myFile.bak

Of 1 files within 1 directories
1 are compressed and 0 are not compressed.
13,728,256 total bytes of data are stored in 4,874,240 bytes.
The compression ratio is 2.8 to 1.

我不包括开关或文件是否在其他地方？