diff --git a/app/build.gradle b/app/build.gradle
index 08dbc25..faa7db6 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "it.awt.mycroft.deepspeech"
-        minSdkVersion 26
+        minSdkVersion 24
         targetSdkVersion 29
         versionCode 1
         versionName "1.0"
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 910df78..7bab31d 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -4,8 +4,6 @@
 
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/it/awt/mycroft/deepspeech/usecase/SpeechRecognitionUseCase.kt b/app/src/main/java/it/awt/mycroft/deepspeech/usecase/SpeechRecognitionUseCase.kt
index a8afc4c..8b342f8 100644
--- a/app/src/main/java/it/awt/mycroft/deepspeech/usecase/SpeechRecognitionUseCase.kt
+++ b/app/src/main/java/it/awt/mycroft/deepspeech/usecase/SpeechRecognitionUseCase.kt
@@ -1,8 +1,8 @@
 package it.awt.mycroft.deepspeech.usecase
 
 import android.content.Context
-import android.os.Environment
 import android.util.Log
+import com.mozilla.speechlibrary.SpeechResultCallback
 import com.mozilla.speechlibrary.SpeechService
 import com.mozilla.speechlibrary.SpeechServiceSettings
 import com.mozilla.speechlibrary.stt.STTResult
@@ -11,18 +11,14 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import java.nio.file.Files
-import java.nio.file.StandardCopyOption
-import kotlin.coroutines.suspendCoroutine
-import com.mozilla.speechlibrary.SpeechResultCallback
-import java.lang.IllegalArgumentException
+import java.io.File
+import java.io.FileOutputStream
+import java.io.IOException
 import kotlin.coroutines.resume
+import kotlin.coroutines.suspendCoroutine
 
 
 class SpeechRecognitionUseCase {
-    private val TAG: String = "SpeechRecognitionUseCase"
-    private val MODEL_PATH = "deepspeech/models/it/"
-    private val LANGUAGE = "it-it"
 
     suspend fun startSpeechRecognition(ctx : Context, mSpeechService : SpeechService, voiceListener : SpeechResultCallback?) : Either<Throwable, String>{
         return suspendCoroutine { cont ->
@@ -54,16 +50,15 @@ class SpeechRecognitionUseCase {
                     voiceListener?.onError(errorType, error)
                 }
             }
-            val modelPath =
-                ctx.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)?.absoluteFile?.toPath()
-                    ?.resolve(MODEL_PATH)?.toString();
+
+            val modelPath = File(ctx.filesDir, MODEL_PATH).absolutePath
             val builder: SpeechServiceSettings.Builder = SpeechServiceSettings.Builder()
                 .withLanguage(LANGUAGE)
                 .withStoreSamples(true)
                 .withStoreTranscriptions(true)
                 .withProductTag("product-tag")
                 .withUseDeepSpeech(true) // If using DeepSpeech
-                .withModelPath(modelPath!!) // If using DeepSpeech
+                .withModelPath(modelPath) // If using DeepSpeech
 
             if (ModelUtils.isReady(modelPath)) {
                 // The model is already downloaded and unzipped
@@ -79,32 +74,32 @@ class SpeechRecognitionUseCase {
 
     private suspend fun copyModel(ctx: Context) {
         return withContext(Dispatchers.IO) {
-            val modelPath = ctx.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)?.absoluteFile?.toPath()?.resolve(MODEL_PATH)
-            Files.createDirectories(modelPath)
-            ctx.assets.open("model/0.8.2/output_graph.tflite").use {
-                val path = modelPath?.resolve("output_graph.tflite")
-                Log.i(TAG, "copying file to: "+path?.toString())
-                Files.copy(it, path, StandardCopyOption.REPLACE_EXISTING);
-            }
-            ctx.assets.open("model/0.8.2/alphabet.txt").use {
-                val path = modelPath?.resolve("alphabet.txt")
-                Log.i(TAG, "copying file to: "+path?.toString())
-                Files.createDirectories(path?.parent)
-                Files.copy(it, path, StandardCopyOption.REPLACE_EXISTING);
-            }
-            ctx.assets.open("model/0.8.2/scorer").use {
-                val path = modelPath?.resolve("scorer")
-                Log.i(TAG, "copying file to: "+path?.toString())
-                Files.createDirectories(path?.parent)
-                Files.copy(it, path, StandardCopyOption.REPLACE_EXISTING);
-            }
-            ctx.assets.open("model/0.8.2/info.json").use {
-                val path = modelPath?.resolve("info.json")
-                Log.i(TAG, "copying file to: "+path?.toString())
-                Files.createDirectories(path?.parent)
-                Files.copy(it, path, StandardCopyOption.REPLACE_EXISTING);
+            val modelPath = File(ctx.filesDir, MODEL_PATH)
+            modelPath.mkdirs()
+
+            copy(ctx, modelPath, "output_graph.tflite")
+            copy(ctx, modelPath, "alphabet.txt")
+            copy(ctx, modelPath, "scorer")
+            copy(ctx, modelPath, "info.json")
+        }
+    }
+
+    @Throws(IOException::class)
+    private fun copy(ctx: Context, modelPath: File, filename: String) {
+        ctx.assets.open("model/0.8.2/$filename").use { it ->
+            FileOutputStream(File(modelPath, filename)).use { output ->
+                val buffer = ByteArray(1024)
+                var length: Int
+                while (it.read(buffer).also { length = it } > 0) {
+                    output.write(buffer, 0, length)
+                }
             }
         }
+    }
 
+    companion object {
+        private const val TAG = "SpeechRecognitionUseCase"
+        private const val MODEL_PATH = "deepspeech/models/it/"
+        private const val LANGUAGE = "it-it"
     }
 }