Taken from LZX — new Windows 10 NTFS compression algorithm: I strongly recommend avoiding LZX and using xpress16k instead. The xpress algorithms do not require a full read of the file before ...

compact /c /exe:lzx /s:e:\test Compressing files in E:\test\ textfile.txt [ERR] textfile.txt: The file system does not support compression. 0 files within 1 directories were compressed. 0 total bytes ...