diff --git a/Govor.API.Tests/IntegrationTests/EF/Repositories/UsersRepositoryTests.cs b/Govor.API.Tests/IntegrationTests/EF/Repositories/UsersRepositoryTests.cs
index 80f997a..ef8b480 100644
--- a/Govor.API.Tests/IntegrationTests/EF/Repositories/UsersRepositoryTests.cs
+++ b/Govor.API.Tests/IntegrationTests/EF/Repositories/UsersRepositoryTests.cs
@@ -39,6 +39,10 @@ public class UsersRepositoryTests
         var random = new Random();
         var users = _fixture.CreateMany<User>(random.Next(2, 10)).ToList();
 
+        _options = new DbContextOptionsBuilder<GovorDbContext>()
+            .UseInMemoryDatabase(databaseName: "DbGovor_users_getall")
+            .Options;
+        
         await using var context = new GovorDbContext(_options);
         var userRepository = new UsersRepository(context, _userValidator);
 
diff --git a/Govor.API.Tests/UnitTests/Services/AuthServiceTests.cs b/Govor.API.Tests/UnitTests/Services/AuthServiceTests.cs
index b67e805..ce4a958 100644
--- a/Govor.API.Tests/UnitTests/Services/AuthServiceTests.cs
+++ b/Govor.API.Tests/UnitTests/Services/AuthServiceTests.cs
@@ -3,7 +3,7 @@ using Govor.API.Services.Authentication;
 using Govor.Core.Infrastructure.Extensions;
 using Govor.Core.Models;
 using Govor.Core.Repositories.Users;
-using Govor.Core.Services;
+using Govor.API.Services.Authentication.Interfaces;
 using Moq;
 
 namespace Govor.API.Tests.UnitTests.Services;
diff --git a/Govor.API.Tests/UnitTests/Services/LocalStorageServiceTests.cs b/Govor.API.Tests/UnitTests/Services/LocalStorageServiceTests.cs
new file mode 100644
index 0000000..6ec0e00
--- /dev/null
+++ b/Govor.API.Tests/UnitTests/Services/LocalStorageServiceTests.cs
@@ -0,0 +1,78 @@
+using AutoFixture;
+using Govor.API.Services;
+using Microsoft.AspNetCore.Hosting;
+using Moq;
+
+namespace Govor.API.Tests.UnitTests.Services;
+
+[TestFixture]
+public class LocalStorageServiceTests
+{
+    private Fixture _fixture;
+    private IStorageService _service;
+    private Mock<IWebHostEnvironment> _webHostEnvironmentMock;
+    private string _tempDirectory;
+    
+    [SetUp]
+    public void SetUp()
+    {
+        _fixture = new Fixture();
+        _webHostEnvironmentMock = new Mock<IWebHostEnvironment>();
+        
+        _tempDirectory = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+        Directory.CreateDirectory(_tempDirectory);
+
+        _webHostEnvironmentMock.Setup(w => w.ContentRootPath).Returns(_tempDirectory);
+
+        _service = new LocalStorageService(_webHostEnvironmentMock.Object);
+    }
+
+    [TearDown]
+    public void TearDown()
+    {
+        if (Directory.Exists(_tempDirectory))
+        {
+            Directory.Delete(_tempDirectory, true);
+        }
+    }
+    
+    [Test]
+    public async Task Given_ValidDataAndFileName_When_SaveAsync_Then_FileIsSaved()
+    {
+        // Arrange
+        var data = _fixture.CreateMany<byte>(1000).ToArray();
+        var fileName = _fixture.Create<string>() + ".txt";
+        var saveDate = DateTime.UtcNow;
+
+        // Act
+        var url = await _service.SaveAsync(data, fileName);
+
+        // Assert
+        Assert.That(url, Is.Not.Null);
+
+        // _tempDirectory/uploads/yyyy/MM/url
+        var datePath = saveDate.ToString("yyyy/MM");
+        var expectedFilePath = Path.Combine(_tempDirectory, "uploads", url);
+        Assert.That(File.Exists(expectedFilePath), Is.True, $"Файл не найден по пути: {expectedFilePath}");
+    }
+    
+    [Test]
+    public void Given_EmptyName_When_SaveAsync_Should_Throw_ArgumentException()
+    {
+        // Arrange 
+        var data = _fixture.CreateMany<byte>(1000).ToArray();
+        
+        // Act & Assert 
+        Assert.ThrowsAsync<ArgumentException>(async () => await _service.SaveAsync(data, string.Empty));
+    }
+
+    [Test]
+    public void Given_EmptyData_When_SaveAsync_Should_Throw_ArgumentException()
+    {
+        // Arrange 
+        var name = _fixture.Create<string>();
+        
+        // Act & Assert 
+        Assert.ThrowsAsync<ArgumentException>(async () => await _service.SaveAsync(default, name));
+    }
+}
\ No newline at end of file
diff --git a/Govor.API/Controllers/AuthController.cs b/Govor.API/Controllers/AuthController.cs
index ca7928b..edc854e 100644
--- a/Govor.API/Controllers/AuthController.cs
+++ b/Govor.API/Controllers/AuthController.cs
@@ -1,6 +1,6 @@
 using Govor.API.Services.Authentication;
 using Govor.Core.DTOs;
-using Govor.Core.Services;
+using Govor.API.Services.Authentication.Interfaces;
 using Microsoft.AspNetCore.Mvc;
 
 namespace Govor.API.Controllers;
diff --git a/Govor.API/Controllers/InviteController.cs b/Govor.API/Controllers/InviteController.cs
index ff4d808..dc2b00f 100644
--- a/Govor.API/Controllers/InviteController.cs
+++ b/Govor.API/Controllers/InviteController.cs
@@ -1,4 +1,4 @@
-using Govor.Core.Services;
+using Govor.API.Services;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 
diff --git a/Govor.API/Program.cs b/Govor.API/Program.cs
index 7943ba5..5e6ff00 100644
--- a/Govor.API/Program.cs
+++ b/Govor.API/Program.cs
@@ -2,17 +2,15 @@ using System.Text;
 using Govor.API.Hubs;
 using Govor.API.Services;
 using Govor.API.Services.Authentication;
+using Govor.API.Services.Authentication.Interfaces;
 using Govor.Core.Infrastructure.Extensions;
 using Govor.Core.Infrastructure.Validators;
 using Govor.Core.Models;
-using Govor.Core.Repositories;
 using Govor.Core.Repositories.Users;
-using Govor.Core.Services;
 using Govor.Data;
 using Govor.Data.Repositories;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
-using Microsoft.AspNetCore.Authorization;
 using Microsoft.IdentityModel.Tokens;
 
 var builder = WebApplication.CreateBuilder(args);
diff --git a/Govor.API/Services/Authentication/AuthService.cs b/Govor.API/Services/Authentication/AuthService.cs
index 79779fa..47f25ec 100644
--- a/Govor.API/Services/Authentication/AuthService.cs
+++ b/Govor.API/Services/Authentication/AuthService.cs
@@ -1,10 +1,10 @@
+using Govor.API.Services.Authentication.Interfaces;
 using Govor.Core;
 using Govor.Core.Infrastructure.Extensions;
 using Govor.Core.Models;
-using Govor.Core.Repositories;
 using Govor.Core.Repositories.Users;
-using Govor.Core.Services;
-using Govor.Data.Repositories;
+using Govor.API.Services;
+
 
 namespace Govor.API.Services.Authentication;
 
diff --git a/Govor.Core/Services/IAuthService.cs b/Govor.API/Services/Authentication/Interfaces/IAuthService.cs
similarity index 77%
rename from Govor.Core/Services/IAuthService.cs
rename to Govor.API/Services/Authentication/Interfaces/IAuthService.cs
index 98c3217..2cd87cb 100644
--- a/Govor.Core/Services/IAuthService.cs
+++ b/Govor.API/Services/Authentication/Interfaces/IAuthService.cs
@@ -1,6 +1,6 @@
 using Govor.Core.Models;
 
-namespace Govor.Core.Services;
+namespace Govor.API.Services.Authentication.Interfaces;
 
 public interface IAccountService
 {
diff --git a/Govor.Core/Services/IJwtService.cs b/Govor.API/Services/Authentication/Interfaces/IJwtService.cs
similarity index 63%
rename from Govor.Core/Services/IJwtService.cs
rename to Govor.API/Services/Authentication/Interfaces/IJwtService.cs
index 65bf53e..96a0c15 100644
--- a/Govor.Core/Services/IJwtService.cs
+++ b/Govor.API/Services/Authentication/Interfaces/IJwtService.cs
@@ -1,6 +1,6 @@
 using Govor.Core.Models;
 
-namespace Govor.Core.Services;
+namespace Govor.API.Services.Authentication.Interfaces;
 
 public interface IJwtService
 {
diff --git a/Govor.API/Services/Authentication/JwtService.cs b/Govor.API/Services/Authentication/JwtService.cs
index 4cbff88..040eed9 100644
--- a/Govor.API/Services/Authentication/JwtService.cs
+++ b/Govor.API/Services/Authentication/JwtService.cs
@@ -1,8 +1,8 @@
 using System.IdentityModel.Tokens.Jwt;
 using System.Security.Claims;
 using System.Text;
+using Govor.API.Services.Authentication.Interfaces;
 using Govor.Core.Models;
-using Govor.Core.Services;
 using Microsoft.Extensions.Options;
 using Microsoft.IdentityModel.Tokens;
 
diff --git a/Govor.Core/Services/IGroupService.cs b/Govor.API/Services/IGroupService.cs
similarity index 76%
rename from Govor.Core/Services/IGroupService.cs
rename to Govor.API/Services/IGroupService.cs
index d3a5d42..955dc32 100644
--- a/Govor.Core/Services/IGroupService.cs
+++ b/Govor.API/Services/IGroupService.cs
@@ -1,6 +1,6 @@
 using Govor.Core.Models;
 
-namespace Govor.Core.Services;
+namespace Govor.API.Services;
 
 public interface IGroupService
 {
diff --git a/Govor.API/Services/IStorageService.cs b/Govor.API/Services/IStorageService.cs
new file mode 100644
index 0000000..778eeeb
--- /dev/null
+++ b/Govor.API/Services/IStorageService.cs
@@ -0,0 +1,10 @@
+using Microsoft.AspNetCore.Http; // для IFormFile
+
+namespace Govor.API.Services;
+
+public interface IStorageService
+{
+    Task<string> SaveAsync(byte[] data, string fileName);
+    Task<Stream> LoadAsync(string url);
+    Task RemoveAsync(string url);
+}
\ No newline at end of file
diff --git a/Govor.API/Services/LocalStorageService.cs b/Govor.API/Services/LocalStorageService.cs
new file mode 100644
index 0000000..61bac10
--- /dev/null
+++ b/Govor.API/Services/LocalStorageService.cs
@@ -0,0 +1,61 @@
+namespace Govor.API.Services;
+
+public class LocalStorageService : IStorageService
+{
+    private readonly string _storagePath;
+
+    public LocalStorageService(IWebHostEnvironment hostingEnvironment)
+    {
+        _storagePath = Path.Combine(hostingEnvironment.ContentRootPath, "uploads");
+        
+        if (!Directory.Exists(_storagePath))
+        {
+            Directory.CreateDirectory(_storagePath);
+        }
+    }
+    
+    public async Task<string> SaveAsync(byte[] data, string fileName)
+    {
+        if(data is null || data.Length == 0) 
+            throw new ArgumentException("Invalid file", nameof(data));
+        
+        if(fileName is null || fileName.Length == 0)
+            throw new ArgumentException("Invalid file name", nameof(fileName));
+        
+        var date = DateTime.UtcNow.ToString("yyyy/MM");
+        
+        var folder = Path.Combine(_storagePath, date);
+        Directory.CreateDirectory(folder);
+        
+        var uniqueFileName = $"{Guid.NewGuid()}_{Path.GetFileName(fileName)}";
+        var fullPath = Path.Combine(folder, uniqueFileName);
+        
+        await using var stream = new FileStream(fullPath, FileMode.Create);
+        stream.WriteAsync(data, 0, data.Length);
+        
+        return Path.Combine(date, uniqueFileName);
+    }
+
+    public async Task<Stream> LoadAsync(string url)
+    {
+        var filePath = Path.Combine(_storagePath, Path.GetFileName(url));
+
+        if (!File.Exists(filePath))
+            throw new FileNotFoundException("File not found.", filePath);
+        
+        await using var file = new FileStream(filePath, FileMode.Open, FileAccess.Read);
+        return file;
+    }
+
+    public async Task RemoveAsync(string url)
+    {
+        var path = Path.Combine(_storagePath, Path.GetFileName(url));
+        
+        if (File.Exists(path))
+        {
+            File.Delete(path);
+        }
+        
+        await Task.CompletedTask;
+    }
+}
diff --git a/Govor.Core/Models/MediaAttachments.cs b/Govor.Core/Models/MediaAttachments.cs
new file mode 100644
index 0000000..b26f857
--- /dev/null
+++ b/Govor.Core/Models/MediaAttachments.cs
@@ -0,0 +1,23 @@
+namespace Govor.Core.Models;
+
+public class MediaAttachments
+{
+    public Guid Id { get; set; }
+    public Guid MessageId { get; set; }
+
+    public MediaType Type { get; set; }
+    public string FilePath { get; set; } = string.Empty; // путь к файлу (локальный или URL)
+    public string MimeType { get; set; } = string.Empty;
+
+    public string? EncryptedKey { get; set; } // если используется отдельное шифрование
+    public Message Message { get; set; } = null!;
+}
+
+public enum MediaType
+{
+    Image,
+    Video,
+    Audio,
+    File,
+    Voice
+}
\ No newline at end of file
diff --git a/Govor.Core/Models/Message.cs b/Govor.Core/Models/Message.cs
index 9e1a20c..3436fcd 100644
--- a/Govor.Core/Models/Message.cs
+++ b/Govor.Core/Models/Message.cs
@@ -10,6 +10,8 @@ public class Message
     public DateTime SentAt { get; set; }
     public bool IsEdited { get; set; } = false;
     public DateTime? EditedAt { get; set; }
+    public List<MessageReaction> Reactions { get; set; } = new List<MessageReaction>();
+    public List<MediaAttachments> MediaAttachments { get; set; } = new List<MediaAttachments>();
 }
 
 public enum RecipientType
diff --git a/Govor.Core/Models/MessageReaction.cs b/Govor.Core/Models/MessageReaction.cs
new file mode 100644
index 0000000..8e8fa80
--- /dev/null
+++ b/Govor.Core/Models/MessageReaction.cs
@@ -0,0 +1,15 @@
+namespace Govor.Core.Models;
+
+public class MessageReaction
+{
+    public Guid Id { get; set; }
+    
+    public Guid MessageId { get; set; }
+    public Message Message { get; set; }
+
+    public Guid UserId { get; set; }
+    public User User { get; set; } 
+    
+    public string ReactionCode { get; set; } // "❤️", "🔥", "👍", ":custom_emoji:" 
+    public DateTime ReactedAt { get; set; } = DateTime.UtcNow;
+}
\ No newline at end of file