can winrar open z files?
WinRAR provides complete support for RAR and ZIP archives and is able to unpack CAB, ARJ, LZH, TAR, GZ, UUE, BZ2, JAR, ISO, 7Z, XZ, Z archives. ... The number of archived files is, for all practical purposes, unlimited. WinRAR offers the ability to create self-extracting and multivolume archives.