When I have more than 250 folders inside my Pose library, I can still uses pz2 files located inside the first 250 folders, but folders beyond 250 will not even display their contents. SophiaDeer, if you convert your hard drive to NTFS from Fat32, pBoost will probably start working again. I have pBoost, but do not use it because I don't want to do the conversion to NTFS. I have technical reasons for this that may not matter to you, so you might want to do the conversion.