diff --git a/src/common/domain/valueobject/Directory.ts b/src/common/domain/valueobject/Directory.ts
index 0509b52..e76c262 100644
--- a/src/common/domain/valueobject/Directory.ts
+++ b/src/common/domain/valueobject/Directory.ts
@@ -37,6 +37,10 @@ export class Directory implements ValueObject {
   ): Promise<void> {
     for await (const dirEntry of Deno.readDir(directory)) {
       if (dirEntry.isDirectory) {
+        if (dirEntry.name === "@eaDir") {
+          continue;
+        }
+
         await Directory.scanDirectory(
           `${directory}/${dirEntry.name}`,
           pattern,
diff --git a/src/scan.ts b/src/scan.ts
index efa51ec..16287f6 100644
--- a/src/scan.ts
+++ b/src/scan.ts
@@ -4,6 +4,7 @@ import type { Configuration } from "./configuration/domain/aggregate/Configurati
 import type { ConfigurationScanWithPattern } from "./configuration/domain/valueobject/ConfigurationScanWithPattern.ts";
 import { ImageDirectory } from "./scanner/domain/aggregate/ImageDirectory.ts";
 import type { VideoGame } from "./scanner/domain/entity/VideoGame.ts";
+import { VideoGamePlatform } from "./scanner/domain/valueobject/VideoGamePlatform.ts";
 import { KvImageRepository } from "./scanner/repository/ImageRepository.ts";
 import {
   KvRelationRepository,
@@ -21,6 +22,12 @@ export const runScanner = async (
   kvDriver: KvDriver,
   debugDatabase: boolean,
 ): Promise<void> => {
+  const hasError: boolean = await preScan(configuration);
+  if (hasError) {
+    console.error("An error occurred while pre-scanning.");
+    return;
+  }
+
   const videoGameRepository = new KvVideoGameRepository(kvDriver);
   const relationRepository = new KvRelationRepository(kvDriver);
 
@@ -108,3 +115,56 @@ export async function scan(
     throw new Error("An error occurred while scanning.");
   }
 }
+
+async function preScan(configuration: Configuration): Promise<boolean> {
+  console.log("Pre-scan...");
+
+  let filesCount = 0;
+  let warningCount = 0;
+  let errorsCount = 0;
+
+  for (const scan of configuration.scans) {
+    const directory: string = scan.directory.path.value;
+    console.log(`Pre-scanning ${directory}...`);
+
+    await scanDirectory(directory, scan.pattern.regex, (filepath) => {
+      const regexResult: RegExpExecArray | null =
+        scan.pattern.regex.exec(filepath);
+
+      if (regexResult) {
+        const group3: string = regexResult[3];
+        try {
+          new VideoGamePlatform(group3);
+          filesCount++;
+        } catch (_) {
+          console.error(`  - "${filepath}" has an invalid platform: ${group3}`);
+          errorsCount++;
+        }
+      } else {
+        warningCount++;
+        console.warn(`  - "${filepath}" does not match the pattern.`);
+      }
+    });
+  }
+
+  console.log("Pre-scan completed!");
+  console.log(`Found ${filesCount} files.`);
+  console.log(`Had ${errorsCount} errors and ${warningCount} warnings.`);
+
+  return errorsCount > 0;
+}
+
+async function scanDirectory(
+  directory: string,
+  pattern: RegExp,
+  onFile: (filepath: string) => void,
+): Promise<void> {
+  for await (const dirEntry of Deno.readDir(directory)) {
+    if (dirEntry.isDirectory && dirEntry.name !== "@eaDir") {
+      await scanDirectory(`${directory}/${dirEntry.name}`, pattern, onFile);
+    } else if (dirEntry.isFile && dirEntry.name !== ".DS_Store") {
+      const fullPath = `${directory}/${dirEntry.name}`;
+      onFile(fullPath);
+    }
+  }
+}
diff --git a/src/scanner/domain/valueobject/VideoGamePlatform.ts b/src/scanner/domain/valueobject/VideoGamePlatform.ts
index 9fe793c..c58df40 100644
--- a/src/scanner/domain/valueobject/VideoGamePlatform.ts
+++ b/src/scanner/domain/valueobject/VideoGamePlatform.ts
@@ -3,16 +3,23 @@ import type { ValueObject } from "../../../common/domain/ValueObject.ts";
 
 const platforms = [
   "Android",
+  "Android (preview)",
   "iOS",
   "Nintendo Switch",
   "PC",
+  "PC (alpha)",
+  "PC (demo)",
+  "PC (early access)",
   "PlayStation 4",
+  "PlayStation 4 (beta)",
   "PlayStation 5",
   "Steam Deck",
+  "unknown",
   "Xbox 360",
   "Xbox Game Cloud",
   "Xbox One",
   "Xbox Series X",
+  "Xbox Series X (beta)",
 ];
 
 export class VideoGamePlatform implements ValueObject {
diff --git a/test/scanner/domain/valueobject/VideoGamePlatform.test.ts b/test/scanner/domain/valueobject/VideoGamePlatform.test.ts
index 1998b82..94acdbd 100644
--- a/test/scanner/domain/valueobject/VideoGamePlatform.test.ts
+++ b/test/scanner/domain/valueobject/VideoGamePlatform.test.ts
@@ -8,7 +8,7 @@ Deno.test(function wrongPlatform() {
   assert(error instanceof DomainError);
   assertEquals(
     error.message,
-    "Platform (foo) must be one of the following: Android, Nintendo Switch, PC, PlayStation 4, PlayStation 5, Steam Deck, Xbox 360, Xbox Game Cloud, Xbox One, Xbox Series X, iOS",
+    "Platform (foo) must be one of the following: Android, Android (preview), Nintendo Switch, PC, PC (alpha), PC (demo), PC (early access), PlayStation 4, PlayStation 4 (beta), PlayStation 5, Steam Deck, Xbox 360, Xbox Game Cloud, Xbox One, Xbox Series X, Xbox Series X (beta), iOS, unknown",
   );
 });