;*****************
;* Directory.asm *
;*****************

format pe console
entry start

include 'win32ax.inc'

section '.code' code readable executable

start:

    cinvoke system,"Dir /B C:\Fasm"
    cinvoke system,"Pause"
    invoke  ExitProcess,0
         
section '.idata' import data readable

    library kernel32,'KERNEL32.DLL',\
            msvcrt,'MSVCRT.DLL'
         
    import kernel32,\
           ExitProcess,'ExitProcess'

    import msvcrt,\
           system,'system'
    

Something low level maybe?
Is it possible to get access to HDD sectors and read from there the files and their contents?

I don't know how the files are managed and stored by windows os "under the hood"

    format PE gui 4.0
    entry start

    include "..\include\win32ax.inc"

section ".data" data readable writeable

    pipe dd 0
    hMem dd 0
    lpBuffer dd 0
    cmd db "Dir /B C:\Fasm"

section ".code" code readable executable
start:

    cinvoke _popen, addr cmd, "rt"
    test eax, eax
    jz .exit

    mov dword [pipe], eax

    cinvoke malloc, 8192
    test eax, eax
    jz .exit

    mov dword [hMem], eax
    add eax, MAX_PATH
    mov dword [lpBuffer], eax

    cinvoke memset, dword [hMem], 0, 8192

    .loop:
    cinvoke fgets, dword [hMem], MAX_PATH, dword [pipe]
    test eax, eax
    jz .close
    cinvoke strcat, dword [lpBuffer], dword [hMem]
    jmp .loop

    .close:
    cinvoke _pclose, dword [pipe]

    invoke MessageBox, HWND_DESKTOP, dword [lpBuffer], addr cmd, MB_OK

    cinvoke free, dword [hMem]

    .exit:
    invoke ExitProcess, 0

section ".idata" import data readable writeable

    library\
    kernel32,"kernel32.dll",\
    user32,"user32.dll",\
    msvcrt,"msvcrt.dll"

import kernel32,\
    ExitProcess,'ExitProcess'

import user32,\
    MessageBox,"MessageBoxA"

import msvcrt,\
    fgets,"fgets",\
    free,"free",\
    malloc,"malloc",\
    memset,"memset",\
    _popen,"_popen",\
    _pclose,"_pclose",\
    strcat,"strcat"