diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 17c82e8..3064fa7 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -72,6 +72,10 @@
                 android:name=".activities.MyGroupsActivity"
                 android:exported="false"
                 android:theme="@style/Theme.BarcodeScannerForEmployees"/>
+        <activity
+                android:name=".activities.SettingsActivity"
+                android:exported="false"
+                android:theme="@style/Theme.BarcodeScannerForEmployees"/>
         <activity
                 android:name=".activities.FullscreenActivity"
                 android:configChanges="orientation|keyboardHidden|screenSize"
@@ -85,7 +89,7 @@
         
         <provider
                 android:name="androidx.core.content.FileProvider"
-                android:authorities="com.google.firebase.components.activities.MainActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddAbstractProductActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider;com.google.firebase.components.activities.ExpiryCalendarActivity.provider;com.google.firebase.components.activities.FindBarcodelessAbstractProduct.provider;com.google.firebase.components.activities.ExpiryCalendarGroupActivity.provider;com.google.firebase.components.activities.AccountSettingsActivity.provider;com.google.firebase.components.activities.GroupActivity.provider"
+                android:authorities="com.google.firebase.components.activities.MainActivity.provider;com.google.firebase.components.activities.FullscreenActivity.provider;com.google.firebase.components.activities.AddAbstractProductActivity.provider;com.google.firebase.components.activities.AddProductActivity.provider;com.google.firebase.components.activities.ExpiryCalendarActivity.provider;com.google.firebase.components.activities.FindBarcodelessAbstractProduct.provider;com.google.firebase.components.activities.ExpiryCalendarGroupActivity.provider;com.google.firebase.components.activities.AccountSettingsActivity.provider;com.google.firebase.components.activities.GroupActivity.provider;com.google.firebase.components.activities.SettingsActivity.provider"
                 android:exported="false"
                 android:grantUriPermissions="true">
             <meta-data
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt
index 9196876..a61a449 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/MainActivity.kt
@@ -1,10 +1,12 @@
 package org.foxarmy.barcodescannerforemployees.activities
 
+import android.app.Activity
 import android.content.DialogInterface
 import android.content.Intent
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.ActionBarDrawerToggle
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
@@ -144,6 +146,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         syncAbstractProducts(net, currentGroup, abstractProductDAO, remoteAbstractProducts, localAbstractProducts)
         syncProducts(productDAO, remoteProducts, localProducts)
         syncCategories(categoryDAO, remoteCategories, localCategories)
+
     }
 
     private fun syncCategories(
@@ -179,7 +182,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
             if (categoryInLocalDB == null && remoteCategory != null) {
                 var newCategory: Category
 
-                with (remoteCategory) {
+                with(remoteCategory) {
                     newCategory = Category(
                         this["local_id"].toString().toInt(),
                         this["name"].toString()
@@ -372,9 +375,6 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         adapter.addFragment(ShelfFragment(), getString(R.string.shelf_title))
         adapter.addFragment(CategoriesFragment(), getString(R.string.categories_title))
 
-        //TODO: Settings
-
-        // setting adapter to view pager.
         viewpager.adapter = adapter
     }
 
@@ -389,6 +389,8 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         when (item.itemId) {
             R.id.nav_account -> {
                 intent = Intent(this, AccountSettingsActivity::class.java)
+                settingsActivityLauncher.launch(intent)
+                return true
             }
 
             R.id.nav_groups -> {
@@ -396,8 +398,7 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
             }
 
             R.id.nav_settings -> {
-                //TODO: Settings
-                return false
+                intent = Intent(this, SettingsActivity::class.java)
             }
         }
         startActivity(intent)
@@ -405,6 +406,25 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
         return true
     }
 
+    private val settingsActivityLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
+        if (result.resultCode == Activity.RESULT_OK) {
+            synchronize()
+            updateAll()
+        }/* else if (result.resultCode == Activity.RESULT_CANCELED) {
+
+        }*/
+    }
+
+    fun updateAll() {
+        val storageFragment: StorageFragment = adapter.getItem(0) as StorageFragment
+        val shelfFragment: ShelfFragment = adapter.getItem(1) as ShelfFragment
+        val categoriesFragment: CategoriesFragment = adapter.getItem(2) as CategoriesFragment
+
+        storageFragment.updateContent()
+        shelfFragment.updateContent()
+        categoriesFragment.updateContent()
+    }
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         if (actionBarDrawerToggle!!.onOptionsItemSelected(item)) {
             return true
@@ -415,11 +435,12 @@ class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelecte
 
             return when (item.itemId) {
                 R.id.action_settings -> {
+                    val intent = Intent(this, SettingsActivity::class.java)
+                    settingsActivityLauncher.launch(intent)
                     true
                 }
 
                 R.id.action_delete -> {
-
                     when (fragment::class.simpleName.toString()) {
                         "StorageFragment" -> {
                             AlertDialog.Builder(this)
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/SettingsActivity.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/SettingsActivity.kt
new file mode 100644
index 0000000..f15a957
--- /dev/null
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/activities/SettingsActivity.kt
@@ -0,0 +1,83 @@
+package org.foxarmy.barcodescannerforemployees.activities
+
+import android.app.Activity
+import android.content.SharedPreferences
+import android.os.Bundle
+import android.view.View
+import android.widget.ArrayAdapter
+import androidx.appcompat.app.AppCompatActivity
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
+import org.foxarmy.barcodescannerforemployees.Net
+import org.foxarmy.barcodescannerforemployees.databinding.ActivitySettingsBinding
+
+class SettingsActivity : AppCompatActivity() {
+    lateinit var binding: ActivitySettingsBinding
+    lateinit var sharedPreferences: SharedPreferences
+    lateinit var myGroups: List<String>
+    lateinit var currentGroup: String
+    lateinit var groupsNames: MutableList<String>
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        sharedPreferences = EncryptedSharedPreferences.create(
+            "sensitive",
+            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC),
+            applicationContext,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
+        myGroups = sharedPreferences.getStringSet("groups", emptySet())!!.toList()
+        currentGroup = sharedPreferences.getString("currentGroup", "offline")!!
+        val net = Net()
+
+        net.token = sharedPreferences.getString("token", "")!!
+        net.language = sharedPreferences.getString("language", "")!!
+        net.server = sharedPreferences.getString("server", "")!!
+
+        groupsNames = mutableListOf()
+
+        for (myGroup in myGroups) {
+            groupsNames.add(net.getGroupName(myGroup.toInt()))
+        }
+
+        binding = ActivitySettingsBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        setUpImageCompressionSeekBar()
+        fillUpCurrentGroupSpinner()
+
+        binding.saveButton.setOnClickListener {
+            sharedPreferences.edit().putString("currentGroup", net.getGroupId(binding.currentGroupSpinner.selectedItem.toString())).apply()
+            sharedPreferences.edit().putInt("imageCompression", binding.imageCompressionFactorSeekBar.progress)
+            setResult(Activity.RESULT_OK)
+            finish()
+        }
+
+        binding.cancelButton.setOnClickListener {
+            setResult(Activity.RESULT_CANCELED)
+            finish()
+        }
+    }
+
+    private fun setUpImageCompressionSeekBar() {
+        val compressionFactor = sharedPreferences.getInt("imageCompression", 0)
+        binding.imageCompressionFactorSeekBar.progress = compressionFactor
+    }
+
+    private fun fillUpCurrentGroupSpinner() {
+
+
+        if (currentGroup == "offline") {
+            binding.currentGroupSetting.visibility = View.GONE
+        }
+
+        val arrayAdapter =
+            ArrayAdapter(this, androidx.appcompat.R.layout.support_simple_spinner_dropdown_item, groupsNames)
+        arrayAdapter.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_spinner_dropdown_item)
+        binding.currentGroupSpinner.adapter = arrayAdapter
+        binding.currentGroupSpinner.setSelection(myGroups.indexOf(currentGroup))
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt
index afaaaef..6c75dc3 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/CategoriesFragment.kt
@@ -36,6 +36,10 @@ class CategoriesFragment : Fragment() {
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
 
+        prepareDatabaseConnection()
+    }
+
+    private fun prepareDatabaseConnection() {
         val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
         categoryDAO = CategoryDAO(dbHelper)
     }
@@ -95,6 +99,7 @@ class CategoriesFragment : Fragment() {
     }
 
     fun updateContent() {
+        prepareDatabaseConnection()
         val layout = view?.findViewById<LinearLayout>(R.id.categoriesLayout)
         layout?.removeAllViews()
 
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/ShelfFragment.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/ShelfFragment.kt
index 703bcf6..b7328d9 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/ShelfFragment.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/ShelfFragment.kt
@@ -17,9 +17,9 @@ import androidx.gridlayout.widget.GridLayout
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
-import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.AddProductActivity
+import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.database.ProductDAO
 import org.foxarmy.barcodescannerforemployees.databinding.FragmentShelfBinding
 import org.foxarmy.barcodescannerforemployees.views.ProductView
@@ -46,8 +46,8 @@ class ShelfFragment : Fragment() {
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
 
-        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
-        productDAO = ProductDAO(dbHelper)
+        prepareDatabaseConnection()
+
     }
 
     override fun onCreateView(
@@ -79,6 +79,11 @@ class ShelfFragment : Fragment() {
         return binding.root
     }
 
+    private fun prepareDatabaseConnection() {
+        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
+        productDAO = ProductDAO(dbHelper)
+    }
+
     fun updateSelected() {
         val grv = view?.findViewById<GridLayout>(R.id.contentGridLayout)
 
@@ -117,6 +122,7 @@ class ShelfFragment : Fragment() {
     }
 
     fun updateContent() {
+        prepareDatabaseConnection()
         thread {
             if (updateInProgress) return@thread
             updateInProgress = true
diff --git a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt
index 31d86d5..baa2f26 100644
--- a/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt
+++ b/app/src/main/java/org/foxarmy/barcodescannerforemployees/fragments/StorageFragment.kt
@@ -13,11 +13,11 @@ import androidx.fragment.app.Fragment
 import androidx.security.crypto.EncryptedSharedPreferences
 import androidx.security.crypto.MasterKeys
 import org.foxarmy.barcodescannerforemployees.Net
-import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.activities.AddAbstractProductActivity
 import org.foxarmy.barcodescannerforemployees.activities.FindBarcodelessAbstractProduct
 import org.foxarmy.barcodescannerforemployees.database.AbstractProductDAO
+import org.foxarmy.barcodescannerforemployees.database.DBStorageController
 import org.foxarmy.barcodescannerforemployees.databinding.FragmentStorageBinding
 import org.foxarmy.barcodescannerforemployees.generateThumbnailForImage
 import org.foxarmy.barcodescannerforemployees.views.AbstractProductView
@@ -45,8 +45,7 @@ class StorageFragment : Fragment() {
             EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
         )
 
-        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
-        abstractProductDAO = AbstractProductDAO(dbHelper)
+        prepareDatabaseConnection()
 
         binding = FragmentStorageBinding.inflate(inflater)
 
@@ -73,6 +72,11 @@ class StorageFragment : Fragment() {
         return binding.root
     }
 
+    private fun prepareDatabaseConnection() {
+        val dbHelper = DBStorageController(requireContext(), sharedPreferences.getString("currentGroup", "database")!!)
+        abstractProductDAO = AbstractProductDAO(dbHelper)
+    }
+
     override fun onResume() {
         super.onResume()
 
@@ -137,6 +141,7 @@ class StorageFragment : Fragment() {
     }
 
     fun updateContent() {
+        prepareDatabaseConnection()
         thread {
             val grv = binding.contentGridLayout
             activity!!.runOnUiThread{
diff --git a/app/src/main/res/drawable/seekbar_tick.xml b/app/src/main/res/drawable/seekbar_tick.xml
new file mode 100644
index 0000000..49b0d34
--- /dev/null
+++ b/app/src/main/res/drawable/seekbar_tick.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+       android:shape="oval">
+    <size android:width="4dp" android:height="4dp" />
+    <solid android:color="#FFFFFF" />
+</shape>
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
new file mode 100644
index 0000000..8a67b35
--- /dev/null
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+                                                   xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
+                                                   android:layout_height="match_parent">
+
+    <LinearLayout
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintStart_toStartOf="parent" android:id="@+id/imageCompressionSetting"
+            android:layout_marginTop="16dp">
+        <TextView
+                android:text="@string/image_scale_factor"
+                android:layout_width="187dp"
+                android:layout_height="30dp" android:id="@+id/imageCompressionFactorTextView" android:textSize="20sp"
+                android:textAlignment="center"
+        />
+        <SeekBar
+                style="@style/Widget.AppCompat.SeekBar.Discrete"
+                android:layout_width="219dp"
+                android:layout_height="wrap_content"
+                android:max="16"
+                android:progress="0"
+                android:id="@+id/imageCompressionFactorSeekBar"
+                android:tickMark="@drawable/seekbar_tick"
+                android:tickMarkTint="@color/seekbar_tick_color"
+                android:layout_marginTop="6dp" android:indeterminateOnly="false" android:splitTrack="true"/>
+
+    </LinearLayout>
+    <LinearLayout
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" android:id="@+id/currentGroupSetting"
+            app:layout_constraintTop_toBottomOf="@+id/imageCompressionSetting">
+        <TextView
+                android:text="@string/current_group"
+                android:layout_width="81dp"
+                android:layout_height="wrap_content" android:id="@+id/currentGroupTextView" android:layout_weight="1"
+                android:textSize="20sp" android:textAlignment="center"/>
+        <Spinner
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content" android:id="@+id/currentGroupSpinner" android:layout_weight="1"
+                android:layout_marginTop="-1dp"/>
+    </LinearLayout>
+    <Button
+            android:text="@string/saveButton"
+            android:layout_width="88dp"
+            android:layout_height="wrap_content" android:id="@+id/saveButton"
+            app:layout_constraintTop_toBottomOf="@+id/currentGroupSetting"
+            app:layout_constraintStart_toStartOf="parent" app:layout_constraintEnd_toStartOf="@+id/cancelButton"
+            android:layout_marginTop="32dp"/>
+    <Button
+            android:text="@string/cancel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" android:id="@+id/cancelButton"
+            app:layout_constraintTop_toBottomOf="@+id/currentGroupSetting" app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toEndOf="@+id/saveButton" android:layout_marginTop="32dp"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-ru/strings.xml b/app/src/main/res/values-ru/strings.xml
index cba70f6..2576407 100644
--- a/app/src/main/res/values-ru/strings.xml
+++ b/app/src/main/res/values-ru/strings.xml
@@ -111,6 +111,9 @@
     <string name="leave_group">Leave group</string>
     <string name="rename_group">Rename group</string>
     <string name="join_or_create_group">Join or create a group</string>
+    <string name="image_scale_factor">Image scale factor\n</string>
+    <string name="current_group">Current group</string>
+    <string name="cancel">Cancel</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index 422d3aa..eef5b6e 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -14,4 +14,5 @@
     <color name="full_freshness">#5AFF30</color>
     <color name="half_freshness">#FFF200</color>
     <color name="expired_freshness">#ff0000</color>
+    <color name="seekbar_tick_color">#FFFFFF</color>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 31757fa..d39507c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -109,6 +109,9 @@
     <string name="leave_group">Leave group</string>
     <string name="rename_group">Rename group</string>
     <string name="join_or_create_group">Join or create a group</string>
+    <string name="image_scale_factor">Image scale factor\n</string>
+    <string name="current_group">Current group</string>
+    <string name="cancel">Cancel</string>
     <string-array name="languages">
         <item>en-US</item>
         <item>ru-RU</item>