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You're using KSC as WSUS server and moving the Windows Update folder to another drive so it won't occupy space on the C drive. However, when you're downloading Windows updates to KSC, the “C:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer” folder is increasing its size up to 15.5 GB.

Solution

Here is the procedure:

1. Make a backup copy of KSC.
2. Stop KSC service
3. Copy folder “C:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer” to its new location, for example “E:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer”
4. Rename old FTServer folder, for example “C:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer_old”
5. Create a symbolic link for FTServer folder that points to new FTServer folder location using this command (run in elevated command prompt, replace link target with path to your new FTServer folder location): mklink /D “C:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer” “E:\ProgramData\KasperskyLab\adminkit\1093\.working\FTServer”
6. Start KSC service.