diff --git a/src/Filesystem/Filesystem.php b/src/Filesystem/Filesystem.php
index 22c5c161..cff922ac 100644
--- a/src/Filesystem/Filesystem.php
+++ b/src/Filesystem/Filesystem.php
@@ -231,6 +231,34 @@ public function isLocalDisk(\Illuminate\Filesystem\FilesystemAdapter $disk): boo
         return ($disk->getAdapter() instanceof \League\Flysystem\Local\LocalFilesystemAdapter);
     }
 
+    /**
+     * Apply a unique index to a filename from provided list i.e.
+     * winter.txt, [winter_1.txt, winter_2.txt] -> winter_3.txt
+     * winter.txt, [winter_1.txt, winter_3.txt] -> winter_4.txt
+     */
+    public function unique(string $str, array $list, string $separator = '_', int $starting = 1, int $step = 1): string
+    {
+        $indexes = [];
+
+        $info = pathinfo($str);
+
+        if (empty($info['filename']) || empty($info['extension'])) {
+            throw new \InvalidArgumentException('$str must be a file name');
+        }
+
+        foreach ($list as $item) {
+            if (!preg_match('/' . $info['filename'] . $separator . '(\d*)\.' . $info['extension'] . '/', $item, $matches)) {
+                continue;
+            }
+
+            $indexes[] = (int) $matches[1];
+        }
+
+        return empty($indexes)
+            ? $info['filename'] . $separator . $starting . '.' . $info['extension']
+            : $info['filename'] . $separator . (max($indexes) + $step) . '.' . $info['extension'];
+    }
+
     /**
      * Finds the path of a given class.
      *
diff --git a/src/Support/Facades/File.php b/src/Support/Facades/File.php
index df56aac4..ed24ada9 100644
--- a/src/Support/Facades/File.php
+++ b/src/Support/Facades/File.php
@@ -55,6 +55,7 @@
  * @method static bool fileNameMatch(string $fileName, string $pattern)
  * @method static bool copyBetweenDisks(string|FilesystemAdapter $sourceDisk, string|FilesystemAdapter $destinationDisk, string $filePath, ?string $targetPath = null)
  * @method static bool moveBetweenDisks(string|FilesystemAdapter $sourceDisk, string|FilesystemAdapter $destinationDisk, string $filePath, ?string $targetPath = null)
+ * @method static string unique(string $str, array $list, string $separator = '_', int $starting = 1, int $step = 1)
  *
  * @see \Winter\Storm\Filesystem\Filesystem
  */
diff --git a/tests/Filesystem/FilesystemTest.php b/tests/Filesystem/FilesystemTest.php
index b9239e2b..a67a6380 100644
--- a/tests/Filesystem/FilesystemTest.php
+++ b/tests/Filesystem/FilesystemTest.php
@@ -11,6 +11,27 @@ public function setUp(): void
         $this->filesystem = new Filesystem();
     }
 
+    public function testUnique()
+    {
+      $cases = [
+            // File exists, make it unique
+            'winter_1.cms' => ['winter.cms', ['winter.cms', 'test_5']],
+            
+            // File already unique, return original
+            'winter.cms' => ['winter.cms', ['winter_1.cms']],
+
+            // Last index available is incremented
+            'winter_4.cms' => ['winter.cms', ['winter_1.cms', 'test_5', 'winter_3.cms']],
+            'winter_98.cms' => ['winter.cms', ['winter_97.cms', 'test_5', 'winter_1.cms']],
+
+            // Separator as space
+            'winter 1.cms' => ['winter.cms', ['winter_1.cms', 'test_5', 'winter_3.cms'], ' '],
+        ];
+        foreach ($cases as $output => $config) {
+            $this->assertSame($output, $this->filesystem->unique(...$config));
+        }
+    }
+
     /**
      * @dataProvider providePathsForIsAbsolutePath
      * @see Symfony\Component\Filesystem\Tests\FilesystemTest::testIsAbsolutePath