diff --git a/src/AzureBlobStorage/AzureBlobStorageAdapter.php b/src/AzureBlobStorage/AzureBlobStorageAdapter.php
index ec21b146f..7842a5879 100644
--- a/src/AzureBlobStorage/AzureBlobStorageAdapter.php
+++ b/src/AzureBlobStorage/AzureBlobStorageAdapter.php
@@ -56,30 +56,20 @@ class AzureBlobStorageAdapter implements FilesystemAdapter, PublicUrlGenerator,
     const ON_VISIBILITY_THROW_ERROR = 'throw';
     const ON_VISIBILITY_IGNORE = 'ignore';
 
-    private BlobRestProxy $client;
     private MimeTypeDetector $mimeTypeDetector;
-    private int $maxResultsForContentsListing;
-    private string $container;
     private PathPrefixer $prefixer;
-    private string $visibilityHandling;
-    private ?StorageServiceSettings $serviceSettings;
 
     public function __construct(
-        BlobRestProxy $client,
-        string $container,
+        private BlobRestProxy $client,
+        private string $container,
         string $prefix = '',
         MimeTypeDetector $mimeTypeDetector = null,
-        int $maxResultsForContentsListing = 5000,
-        string $visibilityHandling = self::ON_VISIBILITY_THROW_ERROR,
-        StorageServiceSettings $serviceSettings = null,
+        private int $maxResultsForContentsListing = 5000,
+        private string $visibilityHandling = self::ON_VISIBILITY_THROW_ERROR,
+        private ?StorageServiceSettings $serviceSettings = null,
     ) {
-        $this->client = $client;
-        $this->container = $container;
         $this->prefixer = new PathPrefixer($prefix);
         $this->mimeTypeDetector = $mimeTypeDetector ?? new FinfoMimeTypeDetector();
-        $this->maxResultsForContentsListing = $maxResultsForContentsListing;
-        $this->visibilityHandling = $visibilityHandling;
-        $this->serviceSettings = $serviceSettings;
     }
 
     public function copy(string $source, string $destination, Config $config): void
diff --git a/src/Config.php b/src/Config.php
index 77c3b5a1d..ace07099b 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -11,14 +11,8 @@ class Config
     public const OPTION_VISIBILITY = 'visibility';
     public const OPTION_DIRECTORY_VISIBILITY = 'directory_visibility';
 
-    /**
-     * @var array
-     */
-    private $options;
-
-    public function __construct(array $options = [])
+    public function __construct(private array $options = [])
     {
-        $this->options = $options;
     }
 
     /**
diff --git a/src/DirectoryAttributes.php b/src/DirectoryAttributes.php
index 3eb1ced61..7841b3cc1 100644
--- a/src/DirectoryAttributes.php
+++ b/src/DirectoryAttributes.php
@@ -7,38 +7,15 @@
 class DirectoryAttributes implements StorageAttributes
 {
     use ProxyArrayAccessToProperties;
+    private string $type = StorageAttributes::TYPE_DIRECTORY;
 
-    /**
-     * @var string
-     */
-    private $type = StorageAttributes::TYPE_DIRECTORY;
-
-    /**
-     * @var string
-     */
-    private $path;
-
-    /**
-     * @var string|null
-     */
-    private $visibility;
-
-    /**
-     * @var int|null
-     */
-    private $lastModified;
-
-    /**
-     * @var array
-     */
-    private $extraMetadata;
-
-    public function __construct(string $path, ?string $visibility = null, ?int $lastModified = null, array $extraMetadata = [])
+    public function __construct(
+        private string $path,
+        private ?string $visibility = null,
+        private ?int $lastModified = null,
+        private array $extraMetadata = [])
     {
-        $this->path = trim($path, '/');
-        $this->visibility = $visibility;
-        $this->lastModified = $lastModified;
-        $this->extraMetadata = $extraMetadata;
+        $this->path = trim($this->path, '/');
     }
 
     public function path(): string
@@ -48,7 +25,7 @@ public function path(): string
 
     public function type(): string
     {
-        return StorageAttributes::TYPE_DIRECTORY;
+        return $this->type;
     }
 
     public function visibility(): ?string
diff --git a/src/DirectoryListing.php b/src/DirectoryListing.php
index 0f429a875..ab73a5467 100644
--- a/src/DirectoryListing.php
+++ b/src/DirectoryListing.php
@@ -14,17 +14,11 @@
  */
 class DirectoryListing implements IteratorAggregate
 {
-    /**
-     * @var iterable<T>
-     */
-    private $listing;
-
     /**
      * @param iterable<T> $listing
      */
-    public function __construct(iterable $listing)
+    public function __construct(private iterable $listing)
     {
-        $this->listing = $listing;
     }
 
     public function filter(callable $filter): DirectoryListing
diff --git a/src/FileAttributes.php b/src/FileAttributes.php
index 35ccc7c1f..42172f8c4 100644
--- a/src/FileAttributes.php
+++ b/src/FileAttributes.php
@@ -7,56 +7,17 @@
 class FileAttributes implements StorageAttributes
 {
     use ProxyArrayAccessToProperties;
-
-    /**
-     * @var string
-     */
-    private $type = StorageAttributes::TYPE_FILE;
-
-    /**
-     * @var string
-     */
-    private $path;
-
-    /**
-     * @var int|null
-     */
-    private $fileSize;
-
-    /**
-     * @var string|null
-     */
-    private $visibility;
-
-    /**
-     * @var int|null
-     */
-    private $lastModified;
-
-    /**
-     * @var string|null
-     */
-    private $mimeType;
-
-    /**
-     * @var array
-     */
-    private $extraMetadata;
+    private string $type = StorageAttributes::TYPE_FILE;
 
     public function __construct(
-        string $path,
-        ?int $fileSize = null,
-        ?string $visibility = null,
-        ?int $lastModified = null,
-        ?string $mimeType = null,
-        array $extraMetadata = []
+        private string $path,
+        private ?int $fileSize = null,
+        private ?string $visibility = null,
+        private ?int $lastModified = null,
+        private ?string $mimeType = null,
+        private array $extraMetadata = []
     ) {
-        $this->path = ltrim($path, '/');
-        $this->fileSize = $fileSize;
-        $this->visibility = $visibility;
-        $this->lastModified = $lastModified;
-        $this->mimeType = $mimeType;
-        $this->extraMetadata = $extraMetadata;
+        $this->path = ltrim($this->path, '/');
     }
 
     public function type(): string
diff --git a/src/Filesystem.php b/src/Filesystem.php
index 216a5f7bc..94fae15ef 100644
--- a/src/Filesystem.php
+++ b/src/Filesystem.php
@@ -18,24 +18,18 @@ class Filesystem implements FilesystemOperator
 {
     use CalculateChecksumFromStream;
 
-    private FilesystemAdapter $adapter;
     private Config $config;
     private PathNormalizer $pathNormalizer;
-    private ?PublicUrlGenerator $publicUrlGenerator;
-    private ?TemporaryUrlGenerator $temporaryUrlGenerator;
 
     public function __construct(
-        FilesystemAdapter $adapter,
+        private FilesystemAdapter $adapter,
         array $config = [],
         PathNormalizer $pathNormalizer = null,
-        PublicUrlGenerator $publicUrlGenerator = null,
-        TemporaryUrlGenerator $temporaryUrlGenerator = null,
+        private ?PublicUrlGenerator $publicUrlGenerator = null,
+        private ?TemporaryUrlGenerator $temporaryUrlGenerator = null,
     ) {
-        $this->adapter = $adapter;
         $this->config = new Config($config);
         $this->pathNormalizer = $pathNormalizer ?: new WhitespacePathNormalizer();
-        $this->publicUrlGenerator = $publicUrlGenerator;
-        $this->temporaryUrlGenerator = $temporaryUrlGenerator;
     }
 
     public function fileExists(string $location): bool
diff --git a/src/InMemory/InMemoryFile.php b/src/InMemory/InMemoryFile.php
index 9e7e46b44..f9d90ac5a 100644
--- a/src/InMemory/InMemoryFile.php
+++ b/src/InMemory/InMemoryFile.php
@@ -12,20 +12,9 @@
  */
 class InMemoryFile
 {
-    /**
-     * @var string
-     */
-    private $contents;
-
-    /**
-     * @var int
-     */
-    private $lastModified;
-
-    /**
-     * @var string
-     */
-    private $visibility;
+    private string $contents = '';
+    private int $lastModified = 0;
+    private ?string $visibility = null;
 
     public function updateContents(string $contents, ?int $timestamp): void
     {
diff --git a/src/InMemory/InMemoryFilesystemAdapter.php b/src/InMemory/InMemoryFilesystemAdapter.php
index b744c0f48..fb6d18d23 100644
--- a/src/InMemory/InMemoryFilesystemAdapter.php
+++ b/src/InMemory/InMemoryFilesystemAdapter.php
@@ -28,21 +28,13 @@ class InMemoryFilesystemAdapter implements FilesystemAdapter
     /**
      * @var InMemoryFile[]
      */
-    private $files = [];
+    private array $files = [];
+    private MimeTypeDetector $mimeTypeDetector;
 
-    /**
-     * @var string
-     */
-    private $defaultVisibility;
-
-    /**
-     * @var MimeTypeDetector
-     */
-    private $mimeTypeDetector;
-
-    public function __construct(string $defaultVisibility = Visibility::PUBLIC, MimeTypeDetector $mimeTypeDetector = null)
-    {
-        $this->defaultVisibility = $defaultVisibility;
+    public function __construct(
+        private string $defaultVisibility = Visibility::PUBLIC,
+        MimeTypeDetector $mimeTypeDetector = null
+    ) {
         $this->mimeTypeDetector = $mimeTypeDetector ?: new FinfoMimeTypeDetector();
     }
 
diff --git a/src/PathPrefixer.php b/src/PathPrefixer.php
index 2a9cd45d0..ca4f007fc 100644
--- a/src/PathPrefixer.php
+++ b/src/PathPrefixer.php
@@ -10,25 +10,15 @@
 
 final class PathPrefixer
 {
-    /**
-     * @var string
-     */
-    private $prefix = '';
+    private string $prefix = '';
 
-    /**
-     * @var string
-     */
-    private $separator = '/';
-
-    public function __construct(string $prefix, string $separator = '/')
+    public function __construct(string $prefix, private string $separator = '/')
     {
         $this->prefix = rtrim($prefix, '\\/');
 
         if ($this->prefix !== '' || $prefix === $separator) {
             $this->prefix .= $separator;
         }
-
-        $this->separator = $separator;
     }
 
     public function prefixPath(string $path): string
diff --git a/src/PathTraversalDetected.php b/src/PathTraversalDetected.php
index d149997f7..fef3edf18 100644
--- a/src/PathTraversalDetected.php
+++ b/src/PathTraversalDetected.php
@@ -8,10 +8,7 @@
 
 class PathTraversalDetected extends RuntimeException implements FilesystemException
 {
-    /**
-     * @var string
-     */
-    private $path;
+    private string $path;
 
     public function path(): string
     {
diff --git a/src/SymbolicLinkEncountered.php b/src/SymbolicLinkEncountered.php
index 8091f5904..e4e0a5334 100644
--- a/src/SymbolicLinkEncountered.php
+++ b/src/SymbolicLinkEncountered.php
@@ -8,10 +8,7 @@
 
 final class SymbolicLinkEncountered extends RuntimeException implements FilesystemException
 {
-    /**
-     * @var string
-     */
-    private $location;
+    private string $location;
 
     public function location(): string
     {
diff --git a/src/UnixVisibility/PortableVisibilityConverter.php b/src/UnixVisibility/PortableVisibilityConverter.php
index 5cc1eb232..117b4d966 100644
--- a/src/UnixVisibility/PortableVisibilityConverter.php
+++ b/src/UnixVisibility/PortableVisibilityConverter.php
@@ -9,43 +9,13 @@
 
 class PortableVisibilityConverter implements VisibilityConverter
 {
-    /**
-     * @var int
-     */
-    private $filePublic;
-
-    /**
-     * @var int
-     */
-    private $filePrivate;
-
-    /**
-     * @var int
-     */
-    private $directoryPublic;
-
-    /**
-     * @var int
-     */
-    private $directoryPrivate;
-
-    /**
-     * @var string
-     */
-    private $defaultForDirectories;
-
     public function __construct(
-        int $filePublic = 0644,
-        int $filePrivate = 0600,
-        int $directoryPublic = 0755,
-        int $directoryPrivate = 0700,
-        string $defaultForDirectories = Visibility::PRIVATE
+        private int $filePublic = 0644,
+        private int $filePrivate = 0600,
+        private int $directoryPublic = 0755,
+        private int $directoryPrivate = 0700,
+        private string $defaultForDirectories = Visibility::PRIVATE
     ) {
-        $this->filePublic = $filePublic;
-        $this->filePrivate = $filePrivate;
-        $this->directoryPublic = $directoryPublic;
-        $this->directoryPrivate = $directoryPrivate;
-        $this->defaultForDirectories = $defaultForDirectories;
     }
 
     public function forFile(string $visibility): int
diff --git a/src/ZipArchive/FilesystemZipArchiveProvider.php b/src/ZipArchive/FilesystemZipArchiveProvider.php
index 93da27cac..1ceb51516 100644
--- a/src/ZipArchive/FilesystemZipArchiveProvider.php
+++ b/src/ZipArchive/FilesystemZipArchiveProvider.php
@@ -8,25 +8,13 @@
 
 class FilesystemZipArchiveProvider implements ZipArchiveProvider
 {
-    /**
-     * @var string
-     */
-    private $filename;
-
-    /**
-     * @var int
-     */
-    private $localDirectoryPermissions;
-
     /**
      * @var bool
      */
     private $parentDirectoryCreated = false;
 
-    public function __construct(string $filename, int $localDirectoryPermissions = 0700)
+    public function __construct(private string $filename, private int $localDirectoryPermissions = 0700)
     {
-        $this->filename = $filename;
-        $this->localDirectoryPermissions = $localDirectoryPermissions;
     }
 
     public function createZipArchive(): ZipArchive
diff --git a/src/ZipArchive/StubZipArchive.php b/src/ZipArchive/StubZipArchive.php
index 28670ee3d..5fb6ec2f2 100644
--- a/src/ZipArchive/StubZipArchive.php
+++ b/src/ZipArchive/StubZipArchive.php
@@ -8,30 +8,11 @@
 
 class StubZipArchive extends ZipArchive
 {
-    /**
-     * @var bool
-     */
-    private $failNextDirectoryCreation = false;
-
-    /**
-     * @var bool
-     */
-    private $failNextWrite = false;
-
-    /**
-     * @var bool
-     */
-    private $failNextDeleteName = false;
-
-    /**
-     * @var bool
-     */
-    private $failWhenSettingVisibility = false;
-
-    /**
-     * @var bool
-     */
-    private $failWhenDeletingAnIndex = false;
+    private bool $failNextDirectoryCreation = false;
+    private bool $failNextWrite = false;
+    private bool $failNextDeleteName = false;
+    private bool $failWhenSettingVisibility = false;
+    private bool $failWhenDeletingAnIndex = false;
 
     public function failNextDirectoryCreation(): void
     {
diff --git a/src/ZipArchive/StubZipArchiveProvider.php b/src/ZipArchive/StubZipArchiveProvider.php
index 914e0438d..a8e8f68f4 100644
--- a/src/ZipArchive/StubZipArchiveProvider.php
+++ b/src/ZipArchive/StubZipArchiveProvider.php
@@ -8,25 +8,17 @@
 
 class StubZipArchiveProvider implements ZipArchiveProvider
 {
-    /**
-     * @var FilesystemZipArchiveProvider
-     */
-    private $provider;
+    private FilesystemZipArchiveProvider $provider;
 
-    /**
-     * @var string
-     */
-    private $filename;
 
     /**
      * @var StubZipArchive
      */
     private $archive;
 
-    public function __construct(string $filename, int $localDirectoryPermissions = 0700)
+    public function __construct(private string $filename, int $localDirectoryPermissions = 0700)
     {
         $this->provider = new FilesystemZipArchiveProvider($filename, $localDirectoryPermissions);
-        $this->filename = $filename;
     }
 
     public function createZipArchive(): ZipArchive
diff --git a/src/ZipArchive/ZipArchiveAdapter.php b/src/ZipArchive/ZipArchiveAdapter.php
index 9b0ba0bf3..3c3b4db5d 100644
--- a/src/ZipArchive/ZipArchiveAdapter.php
+++ b/src/ZipArchive/ZipArchiveAdapter.php
@@ -33,17 +33,12 @@
 
 final class ZipArchiveAdapter implements FilesystemAdapter
 {
-    /** @var PathPrefixer */
-    private $pathPrefixer;
-    /** @var MimeTypeDetector */
-    private $mimeTypeDetector;
-    /** @var VisibilityConverter */
-    private $visibility;
-    /** @var ZipArchiveProvider */
-    private $zipArchiveProvider;
+    private PathPrefixer $pathPrefixer;
+    private MimeTypeDetector$mimeTypeDetector;
+    private VisibilityConverter $visibility;
 
     public function __construct(
-        ZipArchiveProvider $zipArchiveProvider,
+        private ZipArchiveProvider $zipArchiveProvider,
         string $root = '',
         ?MimeTypeDetector $mimeTypeDetector = null,
         ?VisibilityConverter $visibility = null
@@ -51,7 +46,6 @@ public function __construct(
         $this->pathPrefixer = new PathPrefixer(ltrim($root, '/'));
         $this->mimeTypeDetector = $mimeTypeDetector ?? new FinfoMimeTypeDetector();
         $this->visibility = $visibility ?? new PortableVisibilityConverter();
-        $this->zipArchiveProvider = $zipArchiveProvider;
     }
 
     public function fileExists(string $path): bool