diff --git a/app/src/androidTest/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.kt b/app/src/androidTest/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.kt
index 9ea250a816..4466949adf 100644
--- a/app/src/androidTest/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.kt
+++ b/app/src/androidTest/java/org/kiwix/kiwixmobile/utils/files/FileUtilsInstrumentationTest.kt
@@ -254,6 +254,14 @@ class FileUtilsInstrumentationTest {
       DummyUrlData(
         "https://kiwix.org/contributors/images/wikipedia",
         null
+      ),
+      DummyUrlData(
+        "https://kiwix.org/contributors/images/wikipedia:hello.epub",
+        "wikipediahello.epub"
+      ),
+      DummyUrlData(
+        "https://kiwix.org/contributors/Y Gododin: A Poem of the Battle: of Cattraeth.9842.epub",
+        "Y Gododin A Poem of the Battle of Cattraeth.9842.epub"
       )
     )
     dummyUrlArray.forEach {
diff --git a/core/src/main/AndroidManifest.xml b/core/src/main/AndroidManifest.xml
index 1f83796797..0c0ce3e855 100644
--- a/core/src/main/AndroidManifest.xml
+++ b/core/src/main/AndroidManifest.xml
@@ -39,6 +39,12 @@
       <category android:name="android.intent.category.BROWSABLE" />
       <data android:scheme="http" />
     </intent>
+    <!-- To open PDF files in external application -->
+    <intent>
+      <action android:name="android.intent.action.VIEW" />
+      <data android:mimeType="application/pdf" />
+    </intent>
+    <!-- To open EPUB files in external application -->
     <intent>
       <action android:name="android.intent.action.VIEW" />
       <data android:mimeType="application/pdf" />
diff --git a/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt b/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
index 3acc0833b0..c3e1d8ef8a 100644
--- a/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
+++ b/core/src/main/java/org/kiwix/kiwixmobile/core/utils/files/FileUtils.kt
@@ -410,12 +410,15 @@ object FileUtils {
 
    * We are placing a condition here for if the file name does not have a .bin extension,
      then it returns the original file name.
+   * Remove colon if any contains in the fileName since most of the fileSystem
+     will not allow to create file which contains colon in it.
+     see https://github.com/kiwix/kiwix-android/issues/3737
    */
   fun getDecodedFileName(url: String?): String? {
     var fileName: String? = null
     val decodedFileName = URLUtil.guessFileName(url, null, null)
     if (!decodedFileName.endsWith(".bin")) {
-      fileName = decodedFileName
+      fileName = decodedFileName.replace(":", "")
     }
     return fileName
   }
@@ -444,17 +447,8 @@ object FileUtils {
         )
       if (!root.isFileExist()) root.mkdir()
     }
-    if (File(root, fileName).isFileExist()) return File(root, fileName)
-    val fileToSave = sequence {
-      yield(File(root, fileName))
-      yieldAll(
-        generateSequence(1) { it + 1 }.map {
-          File(
-            root, fileName.replace(".", "_$it.")
-          )
-        }
-      )
-    }.first { !it.isFileExist() }
+    val fileToSave = File(root, fileName)
+    if (fileToSave.isFileExist()) return fileToSave
     val source = if (url == null) Uri.parse(src) else Uri.parse(url)
     return try {
       zimReaderContainer.load("$source", emptyMap()).data.use { inputStream ->