Having issues with if/else I end up with two output files - powershell

Question

Having issues with if/else I end up with two output files, I just need
C:\$UserName-$ComputerName-OpenPSTs-$Date.csv if a PST exists and to include details.
or C:\$UserName-$ComputerName-NOPSTs-$Date.csv if no PST exist with "No PSTs Found" written in the file.
Any help would be gratefully appreciated.
#---------------------------------h
#Getting date and system variables
#---------------------------------
$Date = Get-Date -format d-M-yyyy
$UserName = $env:USERNAME
$ComputerName = $env:COMPUTERNAME
#-------------------------------
#Launch Outlook and check stores
#-------------------------------
$Outlook = New-Object -comObject Outlook.Application
$Object = $Outlook.Session.Stores | % {
#-------------------
#Check if PSTs exist
#-------------------
If ($_.FilePath -like "*.PST") {
#------------------------------------------------------------
#If PST exsists then collect data and build CSV column labels
#------------------------------------------------------------
$_ | Select `
#{Expression={$_.DisplayName}; Label="PST Name in Outlook"},`
#{Expression={$_.FilePath}; Label="PST Location/FileName"},`
#{Expression={$_.IsOpen}; Label="PST Open in Outlook"},`
#{Expression={(Get-Item $_.FilePath).Length / 1KB}; Label="PST File Size (KB)"}
$Object | Add-Member -MemberType NoteProperty -Name 'ComputerName' -Value $ComputerName
$Object | Add-Member -MemberType NoteProperty -Name 'UserName' -Value $UserName
#--------------------------------------
#Output PST and User information to log
#--------------------------------------
$Object | Export-Csv -NoTypeInformation C:\$UserName-$ComputerName-OpenPSTs-$Date.csv
#-----------------------------------------
#If no PST exsists then create file NOPSTs
#-----------------------------------------
$Text = "No PSTs Found"
} Else {
$_ | Select $Text | Out-File C:\$UserName-$ComputerName-NOPSTs-$Date.csv
}
}
#---------------
#Closing Outlook
#---------------
Start-Sleep 5
Get-Process | Where {$_.Name -like "Outlook*"} | Stop-Process

Answer 1

Replace this:
$Text = "No PSTs Found"
} Else {
$_ | Select $Text | Out-File C:\$UserName-$ComputerName-NOPSTs-$Date.csv
}
with this:
} Else {
'No PSTs Found' | Out-File C:\$UserName-$ComputerName-NOPSTs-$Date.csv
}