Batch File Loop Doesn't Include Nested Loop - batch-file

Question

Edit1:
So it seems my loop runs to the very last record and then executes the mkdir and MOVE commands. I feel like I'm missing parentheses somewhere?
FOR %%i IN (%folderPath%\*.Pdf) DO SET fileName=%%i
ECHO %fileName%
FOR /f "tokens=3-4 delims=_" %%a IN ("%fileName%") DO SET fileClientID=%%a_%%b
ECHO %fileClientID%
REM Check to see if folders exist, and if they do not, create them
IF NOT EXIST "%folderPath%\%fileYear%" mkdir %folderPath%\%fileYear%
IF NOT EXIST "%folderPath%\%fileYear%\%fileMonth%" mkdir %folderPath%\%fileYear%\%fileMonth%
IF NOT EXIST "%folderPath%\%fileYear%\%fileMonth%\%fileClientID%" mkdir %folderPath%\%fileYear%\%fileMonth%\%fileClientID%
REM Moves the file from source path to destination path
SET fileSourcePath="%fileName%"
SET fileDestPath="%folderPath%\%fileYear%\%fileMonth%\%fileClientID%"
MOVE "%fileSourcePath%" "%fileDestPath%"
PAUSE

Answer 1

So I finally finished the code and it all works as it should. I really appreciate everyone's help getting me to this point as this is my first batch file script I've ever written. Final product below and of course if there are any best practices or more efficient ways of writing it, I'd love the feedback. Thanks again!
#ECHO OFF
SETLOCAL ENABLEEXTENSIONS
SETLOCAL ENABLEDELAYEDEXPANSION
SET folderPath="C:\Users\nha\Desktop\FolderMover\Test"
FOR %%a IN (%folderPath%\*.Pdf) DO (
SET fileDate=%%~ta
SET fileName=%%a
FOR /f "tokens=1,3 delims=/, " %%a IN ("!fileDate!") DO (
SET fileYear=%%b
SET fileMonth=%%a
For /f "tokens=3-4 delims=_" %%a IN ("!fileName!") DO (
SET fileClientID=%%a_%%b
IF NOT EXIST !folderPath!\!fileYear!\!fileMonth!\!fileClientID! mkdir !folderPath!\!fileYear!\!fileMonth!\!fileClientID!
SET fileSourcePath=!fileName!
SET fileDestPath=!folderPath!\!fileYear!\!fileMonth!\!fileClientID!
MOVE !fileSourcePath! !fileDestPath!
)
)
)