How to find out which files are compressed with lzx compression?

Question

Data archiving

Given: Windows 10.0.14393, there are a number of folders and files on the computer. Where and what files - is unknown.
Task: Find out which files and folders are compressed by LZX.

Answer 1

Total Commander > File Search > Plugins.
: 100

compressedfiles.bat

@ECHO OFF
CD "C:\Some Folder\"
ECHO Listing NTFS compressed files:
for /F "delims=" %%a in ('DIR /A-D/B') do @(
 compact /A /I "%%a" | findstr /R ^................................C
)
for /F "delims=" %%a in ('DIR /AD/B/S') do @(
 for /F "delims=" %%b in ('DIR /A-D/B "%%a"') do @(
  ECHO Listing NTFS compressed files on: "%%a\"
  compact /A /I "%%a\%%b" | findstr /R ^................................C
 )
)

Then you can unpack using CompactGUI

Answer 2

linux utility file. comes with a bunch of standard toolkits ported to windows, at least msys from mingw, at least cygwin, at least use the regular Windows subsystem for linux
The utility on the command line allows you to specify a file, displays its mime type by content.