diff --git a/src/Driver/BlueimpUploadDriver.php b/src/Driver/BlueimpUploadDriver.php
index 4265b7e..194bc34 100644
--- a/src/Driver/BlueimpUploadDriver.php
+++ b/src/Driver/BlueimpUploadDriver.php
@@ -100,26 +100,32 @@ public function download(Request $request, StorageConfig $config): Response
     {
         $download = $request->query('download', false);
         if ($download !== false) {
-            $filename = $request->query($this->fileParam);
+            $uuid = $request->query($this->fileParam);
 
-            return $this->fileResponse($filename, $config);
+            return $this->fileResponse($uuid, $config);
         }
 
-        $request->validate([$this->fileParam => 'required']);
-        $filename = $request->query($this->fileParam);
+        $request->validate([
+            $this->fileParam => 'required',
+            'totalSize' => 'required',
+        ]);
+
+        $originalFilename = $request->query($this->fileParam);
+        $totalSize = $request->query('totalSize');
+        $uuid = $this->identifier->generateFileIdentifier($totalSize, $originalFilename);
 
-        if (!$this->chunkExists($config, $filename)) {
+        if (!$this->chunkExists($config, $uuid)) {
             return new JsonResponse([
                 'file' => null,
             ]);
         }
 
-        $chunk = Arr::last($this->chunks($config, $filename));
+        $chunk = Arr::last($this->chunks($config, $uuid));
         $size = explode('-', basename($chunk))[1] + 1;
 
         return new JsonResponse([
             'file' => [
-                'name' => $filename,
+                'name' => $originalFilename,
                 'size' => $size,
             ],
         ]);
@@ -148,7 +154,7 @@ public function save(Request $request, StorageConfig $config, Closure $fileUploa
             throw new BadRequestHttpException($e->getMessage(), $e);
         }
 
-        $uuid = $this->identifier->generateUploadedFileIdentifierName($file);
+        $uuid = $this->identifier->generateFileIdentifier($range->getTotal(), $file->getClientOriginalName());
 
         $chunks = $this->storeChunk($config, $range, $file, $uuid);
 
@@ -178,7 +184,6 @@ public function save(Request $request, StorageConfig $config, Closure $fileUploa
     public function delete(Request $request, StorageConfig $config): Response
     {
         $filename = $request->post($this->fileParam);
-
         $path = $config->getMergedDirectory() . '/' . $filename;
         Storage::disk($config->getDisk())->delete($path);
 
diff --git a/src/Identifier/Identifier.php b/src/Identifier/Identifier.php
index 94a1205..681058d 100644
--- a/src/Identifier/Identifier.php
+++ b/src/Identifier/Identifier.php
@@ -2,8 +2,6 @@
 
 namespace CodingSocks\ChunkUploader\Identifier;
 
-use Illuminate\Http\UploadedFile;
-
 abstract class Identifier
 {
     /**
@@ -14,14 +12,15 @@ abstract class Identifier
     abstract public function generateIdentifier(string $data): string;
 
     /**
-     * @param \Illuminate\Http\UploadedFile $file
+     * @param float $totalSize
+     * @param string $originalFilename
      *
      * @return string
      */
-    public function generateUploadedFileIdentifierName(UploadedFile $file): string
+    public function generateFileIdentifier(float $totalSize, string $originalFilename): string
     {
-        $data = $file->getClientOriginalName();
+        $data = $totalSize . '_' . $originalFilename;
 
-        return $this->generateIdentifier($data) . '.' . $file->guessExtension();
+        return $this->generateIdentifier($data);
     }
 }
diff --git a/tests/Driver/BlueimpUploadDriverTest.php b/tests/Driver/BlueimpUploadDriverTest.php
index 0b1ccb1..a420037 100644
--- a/tests/Driver/BlueimpUploadDriverTest.php
+++ b/tests/Driver/BlueimpUploadDriverTest.php
@@ -94,10 +94,11 @@ public function testDownload()
 
     public function testResume()
     {
-        $this->createFakeLocalFile('chunks/2494cefe4d234bd331aeb4514fe97d810efba29b.txt', '000-099');
+        $this->createFakeLocalFile('chunks/4f0fce4ab7d03efd246b25d3c9e6546a0d65794d', '000-099');
 
         $request = Request::create('', Request::METHOD_GET, [
             'file' => '2494cefe4d234bd331aeb4514fe97d810efba29b.txt',
+            'totalSize' => '200',
         ]);
 
         $response = $this->createTestResponse($this->handler->handle($request));
@@ -149,7 +150,7 @@ public function testUploadFirstChunk()
         $response->assertSuccessful();
         $response->assertJson(['done' => 50]);
 
-        Storage::disk('local')->assertExists('chunks/2494cefe4d234bd331aeb4514fe97d810efba29b.txt/000-099');
+        Storage::disk('local')->assertExists('chunks/5d5115c1064c6e9dead0b7b71506bdfe273fd11c/000-099');
 
         Event::assertNotDispatched(FileUploaded::class, function ($event) use ($file) {
             return $event->file = $file->hashName('merged');
@@ -190,7 +191,7 @@ public function testUploadLastChunk()
         $response->assertSuccessful();
         $response->assertJson(['done' => 100]);
 
-        Storage::disk('local')->assertExists('chunks/2494cefe4d234bd331aeb4514fe97d810efba29b.txt/100-199');
+        Storage::disk('local')->assertExists('chunks/5d5115c1064c6e9dead0b7b71506bdfe273fd11c/100-199');
         Storage::disk('local')->assertExists($file->hashName('merged'));
 
         Event::assertDispatched(FileUploaded::class, function ($event) use ($file) {
diff --git a/tests/Identifier/SessionIdentifierTest.php b/tests/Identifier/SessionIdentifierTest.php
index a4c6826..c3b1bfe 100644
--- a/tests/Identifier/SessionIdentifierTest.php
+++ b/tests/Identifier/SessionIdentifierTest.php
@@ -2,7 +2,6 @@
 
 namespace CodingSocks\ChunkUploader\Tests\Identifier;
 
-use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Facades\Session;
 use CodingSocks\ChunkUploader\Identifier\SessionIdentifier;
 use Orchestra\Testbench\TestCase;
@@ -26,27 +25,13 @@ protected function setUp(): void
 
     public function testGenerateIdentifier()
     {
-        $identifier = $this->identifier->generateIdentifier('test.txt');
-        $this->assertEquals('2494cefe4d234bd331aeb4514fe97d810efba29b', $identifier);
-    }
-
-    public function testGenerateIdentifierWithoutExtension()
-    {
-        $identifier = $this->identifier->generateIdentifier('test');
-        $this->assertEquals('3b7b99bf70a98a544319cf3bad9e912e1b89984d', $identifier);
+        $identifier = $this->identifier->generateIdentifier('any_string');
+        $this->assertEquals('b41d07049729f460973494395f9bf8fe23834d48', $identifier);
     }
 
     public function testUploadedFileIdentifierName()
     {
-        $file = UploadedFile::fake()->create('test.txt', 100);
-        $identifier = $this->identifier->generateUploadedFileIdentifierName($file);
-        $this->assertEquals('2494cefe4d234bd331aeb4514fe97d810efba29b.txt', $identifier);
-    }
-
-    public function testUploadedFileIdentifierNameWithoutExtension()
-    {
-        $file = UploadedFile::fake()->create('test', 100);
-        $identifier = $this->identifier->generateUploadedFileIdentifierName($file);
-        $this->assertEquals('3b7b99bf70a98a544319cf3bad9e912e1b89984d.bin', $identifier);
+        $identifier = $this->identifier->generateFileIdentifier(200, 'any_filename.ext');
+        $this->assertEquals('ec1669bf4dee72e6dd30b94d2d29413601f1b69b', $identifier);
     }
 }