filewatcher.ps1

# references:
# https://community.spiceworks.com/topic/380201-using-powershell-to-check-for-new-files-in-a-directory
# https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/register-objectevent
# https://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher

# you can change $p to whatever path you want, you can also add file filters, and add more events
# i am monitoring a folder for all create/delete events and color coding output
$p = $pwd.path 
$w = New-Object System.IO.FileSystemWatcher $p
$w.IncludeSubdirectories = $true
function a($e,$c){($e.TimeGenerated,$e.SourceEventArgs.ChangeType,$e.SourceEventArgs.FullPath) -join "," | Write-Host -f $c}
Register-ObjectEvent $w -EventName created -Action { a $event "green" }
Register-ObjectEvent $w -EventName deleted -Action { a $event "red" }

# if you'd like to simulate create/change/rename/delete, here's a simple loop to do so.
# just make sure you are in the same path as $p above.
while ($true){
  dir *.* > .\a.txt
  dir *.txt >> .\a.txt
  ren a.txt b.txt
  del b.txt
  sleep 5
}

# to remove all of the watchers, run below. This is assuming you don't have any other 
# event subscriptions you want to keep live. If so, you probably already know what to do. =)
Get-EventSubscriber -Force | Unregister-Event -Force

notify.ps1

#watch for a single file creation event
function w1($p){
  $a = { 
    $msg = ($Event.TimeGenerated,$Event.SourceEventArgs.ChangeType,$Event.SourceEventArgs.FullPath) -join ","
    $m = @{
      To = "email to text for your provider"
      From = "someone@somewhere.mail"
      Smtpserver = "yoursmtpserver"
      Port = 25
    }
    Send-MailMessage @m -Subject "w1 alert - $(get-date)" -Body $msg
    Unregister-Event -SubscriptionId $EventSubscriber.SubscriptionId
    "Email Sent. Halted Monitoring" | write-host -f cyan
  }

  $w = New-Object System.IO.FileSystemWatcher $p
  $w.IncludeSubdirectories = $true

  Register-ObjectEvent $w -EventName created -Action $a

}

w1 "\\server\share"

watchfolder.ps1

$p = "path to folder"
$w = New-Object System.IO.FileSystemWatcher $p
$w.IncludeSubdirectories = $true
function a($e,$c){
   $msg = ($e.TimeGenerated,$e.SourceEventArgs.ChangeType,$e.SourceEventArgs.FullPath) -join ","
   $msg | Write-Host -f $c
}
Register-ObjectEvent $w -EventName created -Action { a $event "green" }
Register-ObjectEvent $w -EventName deleted -Action { a $event "red" }