Delete all files older than 365 days, but exclude certain folders

You can try this script but it will work only if %%~tA in your regional settings is returning the file date using YMD format. If not, the comparison will not work as expected.

@Echo Off
setlocal enabledelayedexpansion

for /r %%A in (*.cfg;*.dat;*.hdr) do (
  set p=%%~pA
  set numeric=no
  if "!p:~1,1!"=="0" set numeric=yes
  if "!p:~1,1!"=="1" set numeric=yes
  if "!p:~1,1!"=="2" set numeric=yes
  if "!p:~1,1!"=="3" set numeric=yes
  if "!p:~1,1!"=="4" set numeric=yes
  if "!p:~1,1!"=="5" set numeric=yes
  if "!p:~1,1!"=="6" set numeric=yes
  if "!p:~1,1!"=="7" set numeric=yes
  if "!p:~1,1!"=="8" set numeric=yes
  if "!p:~1,1!"=="9" set numeric=yes

  if !numeric!==yes (
    if "%%~tA" LSS "2012-11-08" (
      del %%A
    )
  )
)

endlocal

EDIT

I think I have managed to modify the script to work the way you want. I had to get rid of /r switch and call a subroutine recursively or the blacklist would not work properly. The blacklist should be stored in blacklist.txt file in the same directory where the script resides. The file should contain full paths to excluded folders without quotes:

D:\excluded folder1
D:\excluded folder2
D:\included folder\excluded folder3

For each folder that is not blacklisted a subroutine is called which searches for files based on extension and then each file's date is compared with the date given. Please test the script thoroughly. I am afraid it may break on folder names containing special characters like % or ^.

@Echo Off
call :browse D:
goto :EOF

:browse
for /d %%A in ("%~1\*") do (
  find /i "%%A" %~dp0blacklist.txt > nul
  if errorlevel 1 (
    call :delete "%%A"
    call :browse "%%A"
  ) else (
    echo SKIP %%A
  )
)
goto :EOF

:delete
for %%A in ("%~1\*.cfg" "%~1\*.dat" "%~1\*.hdr") do (
  if "%%~tA" LSS "2012-10-08" (
    echo DEL  %%A
    del "%%A"
  ) else (
    echo SAVE %%A
  )
)
goto :EOF

^{I think MBu's answer is better than mine since it doesn't rely on an external tool like Robocopy. And if the blacklisted folders list grow my Robocopy command will look ugly. Nevertheless I want to share what I have found.}

You can misuse Robocopy to delete old files, filter for certain extensions and exclude multiple directories from scanning - all in one command.

md C:\TrashMe 
robocopy C:\ C:\TrashMe *.cfg *.hdr *.txt *.dat /MOVE /E /MINAGE:365 /CREATE /R:1 /W:1 /XD C:\dir1 C:\dir2 C:\TrashMe
rd C:\TrashMe

The batch will create a temporary trash folder named TrashMe.
Robocopy will than move (not copy!) all desired files (correct extension and modified time stamp older than 365 days) to that trash folder. You exclude multiple folders with the /XD switch.
The last action is to remove the trash folder containing all found old files which.

The trick is to use the /CREATE switch so robocopy will create zero-byte files instead of the actual source file. This speeds up the command move and delete part.

Robocopy command in detail

• robocopy calls C:\Windows\System32\Robocopy.exe which is preinstalled on Windows Server 2003, Vista, 7 and 8
• C:\ is the source folder which should be scanned
• C:\TrashMe is the (temporary) target folder for all found files
• *.cfg *.hdr *.txt *.dat are wildcards and will filter for certain file extensions
• /MOVE will cut&paste all found files instead of copy&paste them
• /E will scann all subdirectories
• /MINAGE:365 will exclude all files which are newer than 365 days
• /CREATE will create zero-based files instead of the original source file
• /R:1 /W:1 is the number of retries and wait time between if file is locked and can't be deleted
• /XD C:\dir1 C:\dir2 C:\TrashMe is my list of blacklisted folders. I had to include the TrashMe folder as well because it is placed within the source folder