diff --git a/src/lib/server/db/migrations/1738409340-AddThumbnail.ts b/src/lib/server/db/migrations/1738409340-AddThumbnail.ts
new file mode 100644
index 0000000..0e38647
--- /dev/null
+++ b/src/lib/server/db/migrations/1738409340-AddThumbnail.ts
@@ -0,0 +1,31 @@
+import { Kysely, sql } from "kysely";
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const up = async (db: Kysely<any>) => {
+  // media.ts
+  await db.schema
+    .createTable("thumbnail")
+    .addColumn("id", "integer", (col) => col.primaryKey().generatedAlwaysAsIdentity())
+    .addColumn("directory_id", "integer", (col) =>
+      col.references("directory.id").onDelete("cascade").unique(),
+    )
+    .addColumn("file_id", "integer", (col) =>
+      col.references("file.id").onDelete("cascade").unique(),
+    )
+    .addColumn("category_id", "integer", (col) =>
+      col.references("category.id").onDelete("cascade").unique(),
+    )
+    .addColumn("path", "text", (col) => col.unique().notNull())
+    .addColumn("created_at", "timestamp(3)", (col) => col.notNull())
+    .addColumn("encrypted_content_iv", "text", (col) => col.notNull())
+    .addCheckConstraint(
+      "thumbnail_ck01",
+      sql`(file_id IS NOT NULL)::integer + (directory_id IS NOT NULL)::integer + (category_id IS NOT NULL)::integer = 1`,
+    )
+    .execute();
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const down = async (db: Kysely<any>) => {
+  await db.schema.dropTable("thumbnail").execute();
+};
diff --git a/src/lib/server/db/migrations/index.ts b/src/lib/server/db/migrations/index.ts
index aa6ee13..f58c2d0 100644
--- a/src/lib/server/db/migrations/index.ts
+++ b/src/lib/server/db/migrations/index.ts
@@ -1,7 +1,9 @@
 import * as Initial1737357000 from "./1737357000-Initial";
 import * as AddFileCategory1737422340 from "./1737422340-AddFileCategory";
+import * as AddThumbnail1738409340 from "./1738409340-AddThumbnail";
 
 export default {
   "1737357000-Initial": Initial1737357000,
   "1737422340-AddFileCategory": AddFileCategory1737422340,
+  "1738409340-AddThumbnail": AddThumbnail1738409340,
 };
diff --git a/src/lib/server/db/schema/index.ts b/src/lib/server/db/schema/index.ts
index d3dd9b1..4e427fb 100644
--- a/src/lib/server/db/schema/index.ts
+++ b/src/lib/server/db/schema/index.ts
@@ -2,6 +2,7 @@ export * from "./category";
 export * from "./client";
 export * from "./file";
 export * from "./hsk";
+export * from "./media";
 export * from "./mek";
 export * from "./session";
 export * from "./user";
diff --git a/src/lib/server/db/schema/media.ts b/src/lib/server/db/schema/media.ts
new file mode 100644
index 0000000..9eeccf7
--- /dev/null
+++ b/src/lib/server/db/schema/media.ts
@@ -0,0 +1,17 @@
+import type { ColumnType, Generated } from "kysely";
+
+interface ThumbnailTable {
+  id: Generated<number>;
+  directory_id: number | null;
+  file_id: number | null;
+  category_id: number | null;
+  path: string;
+  created_at: ColumnType<Date, Date, never>;
+  encrypted_content_iv: string; // Base64
+}
+
+declare module "./index" {
+  interface Database {
+    thumbnail: ThumbnailTable;
+  }
+}