diff --git a/src/Server.php b/src/Server.php
index 4c8705c..d22a358 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -93,6 +93,30 @@ public function __construct(FilesystemOperator $source, FilesystemOperator $cach
         $this->tempDir = sys_get_temp_dir();
     }
 
+    /**
+     * Trim path separator from prefix to prevent multiple combined separator.
+     */
+    private function trimPrefixPathSeparator(string $prefix): string
+    {
+        if (str_ends_with($prefix, '://')) {
+            return rtrim($prefix, '/').'/';
+        }
+
+        return trim($prefix, '/');
+    }
+
+    /**
+     * Remove filesystem identifier if present.
+     */
+    private function removeFilesystemIdentifier(string $path): string
+    {
+        if (false === ($identifierPos = strpos($path, '://'))) {
+            return $path;
+        }
+
+        return substr($path, $identifierPos + 3);
+    }
+
     /**
      * Set source file system.
      *
@@ -120,7 +144,7 @@ public function getSource(): FilesystemOperator
      */
     public function setSourcePathPrefix(string $sourcePathPrefix): void
     {
-        $this->sourcePathPrefix = trim($sourcePathPrefix, '/');
+        $this->sourcePathPrefix = $this->trimPrefixPathSeparator($sourcePathPrefix);
     }
 
     /**
@@ -228,7 +252,7 @@ public function getCache(): FilesystemOperator
      */
     public function setCachePathPrefix(string $cachePathPrefix): void
     {
-        $this->cachePathPrefix = trim($cachePathPrefix, '/');
+        $this->cachePathPrefix = $this->trimPrefixPathSeparator($cachePathPrefix);
     }
 
     /**
@@ -357,12 +381,16 @@ public function getCachePath(string $path, array $params = []): string
 
         $cachedPath = hash('xxh3', $sourcePath.'?'.http_build_query($params));
 
+        if (false !== ($identifierPos = strpos($sourcePath, '://'))) {
+            $sourcePath = substr($sourcePath, $identifierPos + 3);
+        }
+
         if ($this->groupCacheInFolders) {
             $cachedPath = $sourcePath.'/'.$cachedPath;
         }
 
         if ($this->cachePathPrefix) {
-            $cachedPath = $this->cachePathPrefix.'/'.$cachedPath;
+            $cachedPath = $this->cachePathPrefix.'/'.$this->removeFilesystemIdentifier($cachedPath);
         }
 
         if ($this->cacheWithFileExtensions) {
diff --git a/tests/ServerTest.php b/tests/ServerTest.php
index b7aed8c..b798625 100644
--- a/tests/ServerTest.php
+++ b/tests/ServerTest.php
@@ -59,6 +59,12 @@ public function testSetSourcePathPrefix(): void
         $this->assertEquals('img', $this->server->getSourcePathPrefix());
     }
 
+    public function testSetSourcePathPrefixWithMonthIdentifier(): void
+    {
+        $this->server->setSourcePathPrefix('img://');
+        $this->assertEquals('img:/', $this->server->getSourcePathPrefix());
+    }
+
     public function testGetSourcePathPrefix(): void
     {
         $this->assertEquals('', $this->server->getSourcePathPrefix());
@@ -83,6 +89,22 @@ public function testGetSourcePathWithPrefix(): void
     {
         $this->server->setSourcePathPrefix('img/');
         $this->assertEquals('img/image.jpg', $this->server->getSourcePath('image.jpg'));
+
+        $this->server->setSourcePathPrefix('img://');
+        $this->assertEquals('img://image.jpg', $this->server->getSourcePath('image.jpg'));
+        $this->assertEquals('img://path/image.jpg', $this->server->getSourcePath('/path/image.jpg'));
+    }
+
+    public function testGetSourcePathWithBaseUrlAndPrefix()
+    {
+        $this->server->setBaseUrl('base/');
+
+        $this->server->setSourcePathPrefix('img/');
+        $this->assertEquals('img/image.jpg', $this->server->getSourcePath('/base/image.jpg'));
+
+        $this->server->setSourcePathPrefix('img://');
+        $this->assertEquals('img://image.jpg', $this->server->getSourcePath('base/image.jpg'));
+        $this->assertEquals('img://path/image.jpg', $this->server->getSourcePath('/base/path/image.jpg'));
     }
 
     public function testGetSourcePathWithMissingPath(): void
@@ -135,6 +157,12 @@ public function testSetCachePathPrefix(): void
         $this->assertEquals('img', $this->server->getCachePathPrefix());
     }
 
+    public function testSetCachePathPrefixWithMonthIdentifier(): void
+    {
+        $this->server->setCachePathPrefix('img://');
+        $this->assertEquals('img:/', $this->server->getCachePathPrefix());
+    }
+
     public function testGetCachePathPrefix(): void
     {
         $this->assertEquals('', $this->server->getCachePathPrefix());
@@ -316,6 +344,17 @@ public function testGetCachePathWithExtensionAndPjpgFmFromPreset(): void
         $this->assertEquals('image.jpg/58b79a7735b61b0d.jpg', $this->server->getCachePath('image.jpg', ['p' => 'pjpg']));
     }
 
+    public function testGetCachePathWithMount(): void
+    {
+        $this->assertEquals('image.jpg/7116fbe362f62057', $this->server->getCachePath('file://image.jpg', []));
+    }
+
+    public function testGetCachePathWithMountAndCachePrefix(): void
+    {
+        $this->server->setCachePathPrefix('cache://');
+        $this->assertEquals('cache://image.jpg/7116fbe362f62057', $this->server->getCachePath('file://image.jpg', []));
+    }
+
     public function testCacheFileExists(): void
     {
         $this->server->setCache(\Mockery::mock(FilesystemOperator::class, function ($mock) {