XDISK21.ZIP contains the following files:

    XDISK    COM     9846   1-23-90   2:10a
    XDISK    DOC    17009   1-23-90   2:10a
    XDISK    LST      330   1-23-90   2:10a
    XDISK    REG     2965   1-23-90   2:10a
    XDISK    SYS     4183   1-23-90   2:10a

 Note:
 XDISK.COM requires DOS ò 2.10 & an 8086 cpu