I am using IBM UCD and configure the directory offset of the step download artifacts
if the working directory is C:/program files/agents/workspace/dir1
../../../ will work
but ../../../../F:/dir2 will cause errors.
I am pretty sure that the path F:/dir2 is legal.
Have you tried just the absolute path to the other drive? You should not need to use a relative path to get to another drive. That's overhead you don't need.