diff --git a/app/api/missions/[missionId]/files/route.ts b/app/api/missions/[missionId]/files/route.ts
index 1314ca9..6064b3f 100644
--- a/app/api/missions/[missionId]/files/route.ts
+++ b/app/api/missions/[missionId]/files/route.ts
@@ -6,12 +6,13 @@ import { S3Client, ListObjectsV2Command, GetObjectCommand, PutObjectCommand, Del
 import { Readable } from 'stream';
 
 // S3 Configuration for missions bucket
+// Use the same configuration as mission-uploads.ts for consistency
 const MISSIONS_S3_CONFIG = {
-  endpoint: (process.env.MINIO_S3_UPLOAD_BUCKET_URL || 'https://dome-api.slm-lab.net').replace(/\/$/, ''),
-  region: process.env.MINIO_AWS_REGION || 'us-east-1',
-  bucket: process.env.MINIO_MISSIONS_BUCKET || 'missions',
-  accessKey: process.env.MINIO_ACCESS_KEY || '',
-  secretKey: process.env.MINIO_SECRET_KEY || ''
+  endpoint: 'https://dome-api.slm-lab.net',
+  region: 'us-east-1',
+  bucket: 'missions',
+  accessKey: process.env.MINIO_ACCESS_KEY || '4aBT4CMb7JIMMyUtp4Pl',
+  secretKey: process.env.MINIO_SECRET_KEY || 'HGn39XhCIlqOjmDVzRK9MED2Fci2rYvDDgbLFElg'
 };
 
 const missionsS3Client = new S3Client({
@@ -21,7 +22,7 @@ const missionsS3Client = new S3Client({
     accessKeyId: MISSIONS_S3_CONFIG.accessKey,
     secretAccessKey: MISSIONS_S3_CONFIG.secretKey
   },
-  forcePathStyle: true
+  forcePathStyle: true // Required for MinIO
 });
 
 // Helper function to check if user has access to mission
@@ -71,11 +72,13 @@ export async function GET(
     const path = searchParams.get('path') || ''; // Subfolder path within mission
 
     // Construct prefix for listing
-    // Note: In MinIO, files are stored without the "missions/" prefix (it's removed during upload)
-    // So the prefix should be just "{missionId}/" or "{missionId}/{path}/"
+    // Based on mission-uploads.ts, files are stored in MinIO without the "missions/" prefix
+    // The filePath in DB is "missions/{missionId}/attachments/{filename}"
+    // But in MinIO it's stored as "{missionId}/attachments/{filename}"
+    // So we need to use just "{missionId}/" or "{missionId}/{path}/" as prefix
     const prefix = path ? `${missionId}/${path}/` : `${missionId}/`;
 
-    console.log(`[GET /api/missions/${missionId}/files] Listing with prefix: ${prefix} in bucket: ${MISSIONS_S3_CONFIG.bucket}`);
+    console.log(`[GET /api/missions/${missionId}/files] Listing with prefix: "${prefix}" in bucket: "${MISSIONS_S3_CONFIG.bucket}"`);
 
     const command = new ListObjectsV2Command({
       Bucket: MISSIONS_S3_CONFIG.bucket,
@@ -83,7 +86,31 @@ export async function GET(
       Delimiter: '/'
     });
 
-    const response = await missionsS3Client.send(command);
+    console.log(`[GET /api/missions/${missionId}/files] S3 command:`, {
+      bucket: MISSIONS_S3_CONFIG.bucket,
+      prefix: prefix,
+      endpoint: MISSIONS_S3_CONFIG.endpoint,
+      accessKey: MISSIONS_S3_CONFIG.accessKey.substring(0, 4) + '...'
+    });
+
+    let response;
+    try {
+      response = await missionsS3Client.send(command);
+      console.log(`[GET /api/missions/${missionId}/files] S3 response success:`, {
+        commonPrefixes: response.CommonPrefixes?.length || 0,
+        contents: response.Contents?.length || 0
+      });
+    } catch (s3Error: any) {
+      console.error(`[GET /api/missions/${missionId}/files] S3 error:`, {
+        code: s3Error.Code,
+        message: s3Error.message,
+        bucket: MISSIONS_S3_CONFIG.bucket,
+        prefix: prefix,
+        endpoint: MISSIONS_S3_CONFIG.endpoint,
+        fullError: s3Error
+      });
+      throw s3Error;
+    }
     
     // Extract folders (CommonPrefixes)
     const folders = (response.CommonPrefixes || []).map(commonPrefix => {