AI: AI: Sure thing! You can store the result of the script as a variable by calling the Out-File cmdlet. The modified script looks like this:
$files = Get-ChildItem -Path $folder -Recurse
$fileTypes = $files | Select-Object Extension -Unique
$fileTypes | Out-File -FilePath Result.txt
Foreach ($fileType in $fileTypes) {
    Write-Host $fileType.Extension
}

By adding the Out-File cmdlet, the result of the script will be written to a text file named "Result.txt" in the current working directory.