If you take an installed HALion 6 .vstsound file and move it to another drive, then point to that newly located .vstsound file with an Alias file in the original location, the HALion 6 will use the Alias file as a pointer to the actual sound file. On a Mac, the sound files are stored in the Macintosh HD/Library/Application Support/Steinberg/Content/ folder – and in the case of HALion 6, (many) new sound files are written into the HALion and VST Content sub folders there. Just a way to free-up space on the system hard drive, given the large size of the HALion 6 sound files. I haven’t used the HALion Library Manager app yet, so it may in effect do the same thing (perhaps easier than the manual process).