$tgt_dir=Read-Host "Enter the path to the target photo files directory"
$start_time=Get-Date -format "yyyy:MM:dd HH:mm:ssK" #get current system time
     Write-Host "INFO: Start_time is $start_time" #For debug visibity
# 1st pass tag writing would be done here. Typically over 90% will not error out
# So the "good" files would have a filemodify date gt $start_time
# In this prototype, no tags are being written, so all files will be lt $start_time
     Write-Host "INFO: Expecting all files to pass the IF Condition" #For debug visibility
exiftool -filename -if "$filemodifydate lt '$start_time'" $tgt_dir\*.jpg
pause