I just read through the 3 sentances they wrote in the Poser ref man about file compression....you'd think they would have more info on it there. 

I just started using PhilC's Wardrobe Wizard. Does the file comprssion mess with WW's function?

W10, Ryzen 5 1600x, 16Gb,RTX2060Super+GTX980, PP11, 11.3.740