@kbm0 The NTFS compression offer via the Windows GUI is MUCH worse in terms of what it offers, relying on algorithms that were no joke first published in the late 70's before I was born. I've tested that as well and the actual space savings are extremely nominal and not at all worth it, IMO. IMO MS should deprecate it or at least add a second GUI checkbox and functionality for automatically LZX compressing at time of copy/move anything added to a folder which has the checkbox turned on.