diff --git a/src/main/java/io/cdap/plugin/google/common/GoogleAuthBaseConfig.java b/src/main/java/io/cdap/plugin/google/common/GoogleAuthBaseConfig.java
index 6f4443e..710d527 100644
--- a/src/main/java/io/cdap/plugin/google/common/GoogleAuthBaseConfig.java
+++ b/src/main/java/io/cdap/plugin/google/common/GoogleAuthBaseConfig.java
@@ -177,14 +177,17 @@ & checkPropertyIsSet(collector, clientSecret, CLIENT_SECRET, CLIENT_SECRET_LABEL
   }
 
   private boolean validateServiceAccount(FailureCollector collector) {
-    if (isServiceAccountFilePath() != null && isServiceAccountFilePath()) {
+    final Boolean serviceAccountFilePath = isServiceAccountFilePath();
+    final Boolean serviceAccountJson = isServiceAccountJson();
+
+    if (serviceAccountFilePath != null && serviceAccountFilePath) {
       if (!AUTO_DETECT_VALUE.equals(accountFilePath) && !new File(accountFilePath).exists()) {
         collector.addFailure("Service Account File Path is not available.",
                              "Please provide path to existing Service Account file.")
           .withConfigProperty(ACCOUNT_FILE_PATH);
       }
     }
-    if (isServiceAccountJson() != null && isServiceAccountJson()) {
+    if (serviceAccountJson != null && serviceAccountJson) {
       if (!Optional.ofNullable(getServiceAccountJson()).isPresent()) {
         collector.addFailure("Service Account JSON can not be empty.",
                              "Please provide Service Account JSON.")
diff --git a/src/main/java/io/cdap/plugin/google/common/GoogleDriveClient.java b/src/main/java/io/cdap/plugin/google/common/GoogleDriveClient.java
index 607e18b..11bcd66 100644
--- a/src/main/java/io/cdap/plugin/google/common/GoogleDriveClient.java
+++ b/src/main/java/io/cdap/plugin/google/common/GoogleDriveClient.java
@@ -105,7 +105,7 @@ protected Credential getCredentials() throws IOException {
   }
 
   protected List<String> getRequiredScopes() {
-    return Collections.singletonList(DriveScopes.DRIVE);
+    return Collections.singletonList(DriveScopes.DRIVE_READONLY);
   }
 
   public void checkRootFolder() throws IOException {
diff --git a/src/main/java/io/cdap/plugin/google/drive/source/GoogleDriveInputFormat.java b/src/main/java/io/cdap/plugin/google/drive/source/GoogleDriveInputFormat.java
index ddcf2d3..fe85fce 100644
--- a/src/main/java/io/cdap/plugin/google/drive/source/GoogleDriveInputFormat.java
+++ b/src/main/java/io/cdap/plugin/google/drive/source/GoogleDriveInputFormat.java
@@ -18,9 +18,6 @@
 
 import com.github.rholder.retry.RetryException;
 import com.google.api.services.drive.model.File;
-import com.google.gson.JsonObject;
-import io.cdap.cdap.api.data.batch.Input;
-import io.cdap.plugin.common.SourceInputFormatProvider;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapreduce.InputFormat;
 import org.apache.hadoop.mapreduce.InputSplit;
diff --git a/src/main/java/io/cdap/plugin/google/drive/source/SchemaBuilder.java b/src/main/java/io/cdap/plugin/google/drive/source/SchemaBuilder.java
index e0ee739..476168e 100644
--- a/src/main/java/io/cdap/plugin/google/drive/source/SchemaBuilder.java
+++ b/src/main/java/io/cdap/plugin/google/drive/source/SchemaBuilder.java
@@ -27,7 +27,7 @@
  * Util class for building pipeline schema.
  */
 public class SchemaBuilder {
-  public static final String SCHEMA_ROOT_RECORD_NAME = "etlSchemaBody";
+  public static final String SCHEMA_ROOT_RECORD_NAME = "FileFromFolder";
 
   public static final String IMAGE_METADATA_FIELD_NAME = "imageMediaMetadata";
   public static final String VIDEO_METADATA_FIELD_NAME = "videoMediaMetadata";