diff --git a/app/src/main/java/com/zane/smapiinstaller/logic/ApkPatcher.java b/app/src/main/java/com/zane/smapiinstaller/logic/ApkPatcher.java
index 6dfb6f7..7e7f84d 100644
--- a/app/src/main/java/com/zane/smapiinstaller/logic/ApkPatcher.java
+++ b/app/src/main/java/com/zane/smapiinstaller/logic/ApkPatcher.java
@@ -125,6 +125,16 @@ public class ApkPatcher {
                         });
                         return distFile.getAbsolutePath();
                     } else if (advancedStage == 1) {
+                        File contentFolder = new File(externalFilesDir.getAbsolutePath() + "/StardewValley/Content");
+                        if(contentFolder.exists()) {
+                            if(!contentFolder.isDirectory()) {
+                                errorMessage.set(context.getString(R.string.error_directory_exists_with_same_filename, contentFolder.getAbsolutePath()));
+                                return null;
+                            }
+                        }
+                        else {
+                            extract(0);
+                        }
                         ZipUtils.removeEntries(sourceDir, "assets/Content", distFile.getAbsolutePath(), (progress) -> emitProgress((int) (progress * 0.05)));
                     } else {
                         Files.copy(apkFile, distFile);
@@ -195,7 +205,8 @@ public class ApkPatcher {
                         if (StringUtils.equals(crc, entry.getPatchCrc())) {
                             bytes = FileUtils.patchFile(originBytes, bytes);
                             if (bytes == null) {
-                                errorMessage.set(StringUtils.stripToEmpty(errorMessage.get()) + "\nPatch " + entry.getTargetPath() + " failed");
+                                String errorMsg = context.getString(R.string.error_patch_crc_incorrect, entry.getTargetPath(), crc);
+                                errorMessage.set(StringUtils.stripToEmpty(errorMessage.get()) + "\n" + errorMsg);
                                 return null;
                             }
                         }
@@ -203,7 +214,8 @@ public class ApkPatcher {
                             bytes = originBytes;
                         }
                         else {
-                            errorMessage.set(StringUtils.stripToEmpty(errorMessage.get()) + "\nPatch " + entry.getTargetPath() + " failed: CRC (" + crc + ")");
+                            String errorMsg = context.getString(R.string.error_patch_crc_incorrect, entry.getTargetPath(), crc);
+                            errorMessage.set(StringUtils.stripToEmpty(errorMessage.get()) + "\n" + errorMsg);
                             return null;
                         }
                     }
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 4426cad..fb66564 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -78,4 +78,6 @@
     <string name="privacy_policy">隱私權條款</string>
     <string name="settings_advanced_mode">高級安裝模式</string>
     <string name="button_initial">初始化</string>
+    <string name="error_directory_exists_with_same_filename">%1$s不是一個文件夾, 請手動刪除該文件</string>
+    <string name="error_patch_crc_incorrect">增量更新%1$s失敗: CRC (%2$s))</string>
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index e40bad6..afdbd1b 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -78,4 +78,6 @@
     <string name="privacy_policy">隐私权政策</string>
     <string name="settings_advanced_mode">高级安装模式</string>
     <string name="button_initial">初始化</string>
+    <string name="error_directory_exists_with_same_filename">%1$s不是一个文件夹, 请手动删除该文件</string>
+    <string name="error_patch_crc_incorrect">增量更新%1$s失败: CRC (%2$s))</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index db653fd..37c7e7d 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -82,4 +82,6 @@
     <string name="privacy_policy">Privacy Policy</string>
     <string name="settings_advanced_mode">Advanced Patch Mode</string>
     <string name="button_initial">Initial</string>
+    <string name="error_directory_exists_with_same_filename">%1$s is not a directory, please delete it manually.</string>
+    <string name="error_patch_crc_incorrect">Patch %1$s failed: CRC (%2$s))</string>
 </resources>