diff --git a/inc/Service/Media/FallbackMediaHandler.php b/inc/Service/Media/FallbackMediaHandler.php
index a3e0c23f..5d5e8931 100644
--- a/inc/Service/Media/FallbackMediaHandler.php
+++ b/inc/Service/Media/FallbackMediaHandler.php
@@ -2,6 +2,8 @@
 namespace Vichan\Service\Media;
 
 use Vichan\Data\ThumbGenerationResult;
+use Vichan\Functions\Fs;
+use Mimey\MimeTypes;
 
 
 class FallbackMediaHandler implements MediaHandler {
@@ -9,14 +11,16 @@ class FallbackMediaHandler implements MediaHandler {
 	private int $width;
 	private int $height;
 	private string $mime;
+	private MimeTypes $mime_types;
 
 
-	public function __construct(ImageMetadataReader $image_metadate_reader, string $default_thumb_path) {
+	public function __construct(ImageMetadataReader $image_metadate_reader, string $default_thumb_path, MimeTypes $mime_types) {
 		$res = $image_metadate_reader->getMetadata($default_thumb_path);
 		$this->path = $default_thumb_path;
 		$this->width = $res->width;
 		$this->height = $res->height;
 		$this->mime = $res->mime;
+		$this->mime_types = $mime_types;
 	}
 
 	public function supportsMime(string $mime): bool {
@@ -24,7 +28,40 @@ class FallbackMediaHandler implements MediaHandler {
 	}
 
 	public function openHandle(string $file_path, string $file_mime, int $file_kind): mixed {
-		return null;
+		return [ $file_path, $file_kind ];
+	}
+
+	public function closeHandle(mixed $handle) {
+		// No-op
+	}
+
+	public function installMediaAndGenerateThumb(
+		mixed $handle,
+		string $media_preferred_out_file_path,
+		string $thumb_preferred_out_file_path,
+		string $thumb_preferred_out_mime,
+		int $thumb_max_width,
+		int $thumb_max_height
+	) {
+		list($source_file_path, $source_file_kind) = $handle;
+
+		if ($source_file_kind === self::FILE_KIND_UPLOADED) {
+			if (!Fs\move_or_copy_uploaded($source_file_path, $media_preferred_out_file_path)) {
+				throw new \RuntimeException("Could not move or copy uploaded file '$source_file_path' to '$media_preferred_out_file_path'");
+			}
+		} else {
+			if (!Fs\link_or_copy($source_file_path, $media_preferred_out_file_path)) {
+				throw new \RuntimeException("Could not link or copy '$source_file_path' to '$media_preferred_out_file_path'");
+			}
+		}
+
+		return $this->generateThumb(
+			$handle,
+			$thumb_preferred_out_file_path,
+			$thumb_preferred_out_mime,
+			$thumb_max_width,
+			$thumb_max_height
+		);
 	}
 
 	public function generateThumb(