![]() Maybe there's some difference in how they would act across separate drives or a network. Both seem to work the same across partitions on the same drive. You can drag-n-drop files into either type and it works just like a normal folder. Practically speaking, I could see no difference between the /d and /j options. I think this is the folder-hardlink equivalent of the /h case for files above. I am guessing this doesn't use any extra disk space (compared to a shortcut, which does use a little). The Windows GUI Properties shows this entry as being an actual folder (not a shortcut). It also shows the path you chose, but regardless if you supplied a relative or absolute path, the final result is always the full absolute path. This special folder type is shown at the Command Prompt as a. (So it effectively does, again, without using any extra disk space). mklink /j Like above, produces a duplicate folder (directory) that behaves and appears to contain all the files of the original folder. Probably, but I'm just guessing, the does consume a little space, just like a ShortCut (.lnk file). Right-clicking and viewing its Properties, this has a ShortCut tab, but doesn't permit you to change anything except its name. (At the Command Prompt, you can use the Move command to manipulate it, and it is understandable there). Cut-n-pasting using the GUI can give some pretty confusing results. The absolute-path one works better in this respect. But (for Vista) the relative-path one doesn't appear to update the icon or show its size in its Properties. Either way makes a "folder" at the Windows GUI level. It also shows the path you chose, which may be either relative (partial) or absolute (full) path. ![]() The files themselves are not actually duplicated, so there is no practical disk space consumed. mklink /d Produces a duplicate folder (directory), allowing you to have have multiple folders that all share the one-and-same files. It will not appear when you type DIR /AL either, which generates a listing of all special "reparse-points". (It does not say Junction or Symlink or give any other clue). Of particular interest, at the Command Prompt, the mklink'd filename does not appear special in any way. This /h option cannot be used to make duplicated folder (directory) references. So you can "duplicate" a file without it costing any additional disk space. Here's an overview of what I saw: mklink /h Allows you to make duplicated directory entries (filenames) to a file without replicating its data. You might want to do these same experiments and make note of what you find. First, I made a test-file and test-folder on the desktop. I did some experiments today with the mklink options /d /h /j. Edit:the /d switch has the same effect as the /j switch I think part of the reason the free space display was eliminated from W.Explorer was for the very reason you mention.
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