diff --git a/src/services/data-management/__tests__/backup-scheduler.test.ts b/src/services/data-management/__tests__/backup-scheduler.test.ts
new file mode 100644
index 0000000..b4618e7
--- /dev/null
+++ b/src/services/data-management/__tests__/backup-scheduler.test.ts
@@ -0,0 +1,319 @@
+/**
+ * Tests unitaires pour BackupScheduler
+ */
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
+import { BackupScheduler } from '../backup-scheduler';
+import { backupService } from '../backup';
+import { getToday, addMinutes } from '@/lib/date-utils';
+
+// Mock de backupService
+vi.mock('../backup', () => ({
+  backupService: {
+    getConfigSync: vi.fn(),
+    createBackup: vi.fn(),
+  },
+}));
+
+// Mock de date-utils
+vi.mock('@/lib/date-utils', () => ({
+  getToday: vi.fn(),
+  addMinutes: vi.fn(),
+}));
+
+describe('BackupScheduler', () => {
+  let scheduler: BackupScheduler;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    scheduler = new BackupScheduler();
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    scheduler.stop();
+    vi.useRealTimers();
+  });
+
+  describe('start', () => {
+    it('devrait démarrer le scheduler si activé', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+
+      expect(scheduler.isActive()).toBe(true);
+    });
+
+    it('ne devrait pas démarrer si désactivé', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: false,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+
+      expect(scheduler.isActive()).toBe(false);
+    });
+
+    it('ne devrait pas démarrer deux fois', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      const firstCall = scheduler.isActive();
+      scheduler.start();
+      const secondCall = scheduler.isActive();
+
+      expect(firstCall).toBe(true);
+      expect(secondCall).toBe(true);
+    });
+  });
+
+  describe('stop', () => {
+    it('devrait arrêter le scheduler', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      expect(scheduler.isActive()).toBe(true);
+
+      scheduler.stop();
+      expect(scheduler.isActive()).toBe(false);
+    });
+
+    it("devrait gérer l'arrêt si pas démarré", () => {
+      scheduler.stop();
+      expect(scheduler.isActive()).toBe(false);
+    });
+  });
+
+  describe('restart', () => {
+    it('devrait redémarrer le scheduler', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      expect(scheduler.isActive()).toBe(true);
+
+      scheduler.restart();
+      expect(scheduler.isActive()).toBe(true);
+    });
+  });
+
+  describe('isActive', () => {
+    it('devrait retourner false si pas démarré', () => {
+      expect(scheduler.isActive()).toBe(false);
+    });
+
+    it('devrait retourner true si démarré', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      expect(scheduler.isActive()).toBe(true);
+    });
+  });
+
+  describe('performScheduledBackup', () => {
+    it('devrait exécuter une sauvegarde automatique', async () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      vi.mocked(backupService.createBackup).mockResolvedValue({
+        id: '1',
+        filename: 'backup.db.gz',
+        size: 1024,
+        createdAt: new Date(),
+        type: 'automatic',
+        status: 'success',
+      } as any);
+
+      scheduler.start();
+
+      // Avancer le timer pour déclencher la sauvegarde une seule fois
+      vi.advanceTimersByTime(60 * 60 * 1000); // 1 heure
+
+      // Attendre que la sauvegarde soit exécutée
+      await vi.waitFor(() => {
+        expect(backupService.createBackup).toHaveBeenCalledWith('automatic');
+      });
+
+      scheduler.stop();
+    });
+
+    it('devrait gérer les sauvegardes ignorées', async () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      vi.mocked(backupService.createBackup).mockResolvedValue(null);
+
+      scheduler.start();
+
+      vi.advanceTimersByTime(60 * 60 * 1000);
+      await vi.waitFor(() => {
+        expect(backupService.createBackup).toHaveBeenCalled();
+      });
+
+      scheduler.stop();
+    });
+
+    it('devrait gérer les erreurs de sauvegarde', async () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      vi.mocked(backupService.createBackup).mockRejectedValue(
+        new Error('Backup failed')
+      );
+
+      scheduler.start();
+
+      vi.advanceTimersByTime(60 * 60 * 1000);
+      await vi.waitFor(() => {
+        expect(backupService.createBackup).toHaveBeenCalled();
+      });
+
+      scheduler.stop();
+    });
+  });
+
+  describe('getIntervalMs', () => {
+    it('devrait convertir hourly en millisecondes', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      const status = scheduler.getStatus();
+
+      expect(status.interval).toBe('hourly');
+    });
+
+    it('devrait convertir daily en millisecondes', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'daily',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      const status = scheduler.getStatus();
+
+      expect(status.interval).toBe('daily');
+    });
+
+    it('devrait convertir weekly en millisecondes', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'weekly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      const status = scheduler.getStatus();
+
+      expect(status.interval).toBe('weekly');
+    });
+  });
+
+  describe('getNextBackupTime', () => {
+    it('devrait retourner null si pas démarré', () => {
+      const nextTime = scheduler.getNextBackupTime();
+
+      expect(nextTime).toBeNull();
+    });
+
+    it('devrait calculer le prochain moment de sauvegarde', () => {
+      const mockDate = new Date('2024-01-15T12:00:00Z');
+      vi.mocked(getToday).mockReturnValue(mockDate);
+      vi.mocked(addMinutes).mockReturnValue(new Date('2024-01-15T13:00:00Z'));
+
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      scheduler.start();
+      const nextTime = scheduler.getNextBackupTime();
+
+      expect(nextTime).not.toBeNull();
+      expect(addMinutes).toHaveBeenCalled();
+    });
+  });
+
+  describe('getStatus', () => {
+    it('devrait retourner le statut du scheduler', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: true,
+        interval: 'daily',
+        maxBackups: 10,
+        backupPath: '/custom/backups',
+      } as any);
+
+      scheduler.start();
+      const status = scheduler.getStatus();
+
+      expect(status.isRunning).toBe(true);
+      expect(status.isEnabled).toBe(true);
+      expect(status.interval).toBe('daily');
+      expect(status.maxBackups).toBe(10);
+      expect(status.backupPath).toBe('/custom/backups');
+    });
+
+    it('devrait retourner le statut si pas démarré', () => {
+      vi.mocked(backupService.getConfigSync).mockReturnValue({
+        enabled: false,
+        interval: 'hourly',
+        maxBackups: 5,
+        backupPath: '/backups',
+      } as any);
+
+      const status = scheduler.getStatus();
+
+      expect(status.isRunning).toBe(false);
+      expect(status.isEnabled).toBe(false);
+    });
+  });
+});
diff --git a/src/services/data-management/__tests__/backup.test.ts b/src/services/data-management/__tests__/backup.test.ts
new file mode 100644
index 0000000..741cde8
--- /dev/null
+++ b/src/services/data-management/__tests__/backup.test.ts
@@ -0,0 +1,400 @@
+/**
+ * Tests unitaires pour BackupService
+ */
+
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { BackupService } from '../backup';
+import { prisma } from '@/services/core/database';
+import { userPreferencesService } from '@/services/core/user-preferences';
+import { BackupUtils } from '@/lib/backup-utils';
+import { promises as fs } from 'fs';
+import path from 'path';
+
+// Mock de prisma
+vi.mock('@/services/core/database', () => ({
+  prisma: {
+    $disconnect: vi.fn(),
+    $connect: vi.fn(),
+    $queryRaw: vi.fn(),
+    userPreferences: {
+      upsert: vi.fn(),
+    },
+  },
+}));
+
+// Mock de userPreferencesService
+vi.mock('@/services/core/user-preferences', () => ({
+  userPreferencesService: {
+    getAllPreferences: vi.fn(),
+    getViewPreferences: vi.fn(),
+  },
+}));
+
+// Mock de BackupUtils
+vi.mock('@/lib/backup-utils', () => ({
+  BackupUtils: {
+    resolveBackupStoragePath: vi.fn(),
+    resolveDatabasePath: vi.fn(),
+    calculateFileHash: vi.fn(),
+    ensureDirectory: vi.fn(),
+    createSQLiteBackup: vi.fn(),
+    compressFile: vi.fn(),
+    decompressFileTemp: vi.fn(),
+    writeLogEntry: vi.fn(),
+    parseBackupFilename: vi.fn(),
+    generateBackupFilename: vi.fn(),
+  },
+}));
+
+// Mock de fs (pour promises)
+vi.mock('fs', () => ({
+  promises: {
+    readFile: vi.fn(),
+    writeFile: vi.fn(),
+    stat: vi.fn(),
+    readdir: vi.fn(),
+    unlink: vi.fn(),
+    access: vi.fn(),
+    copyFile: vi.fn(),
+  },
+}));
+
+describe('BackupService', () => {
+  let backupService: BackupService;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    backupService = new BackupService();
+
+    // Mocks par défaut
+    vi.mocked(BackupUtils.resolveBackupStoragePath).mockReturnValue('/backups');
+    vi.mocked(BackupUtils.resolveDatabasePath).mockReturnValue('/db/dev.db');
+    vi.mocked(BackupUtils.calculateFileHash).mockResolvedValue('hash123');
+    vi.mocked(BackupUtils.ensureDirectory).mockResolvedValue(undefined);
+    vi.mocked(BackupUtils.createSQLiteBackup).mockResolvedValue(undefined);
+    vi.mocked(BackupUtils.compressFile).mockResolvedValue(
+      '/backups/file.db.gz'
+    );
+    vi.mocked(BackupUtils.parseBackupFilename).mockReturnValue({
+      type: 'manual',
+      date: new Date(),
+    });
+    vi.mocked(BackupUtils.generateBackupFilename).mockReturnValue(
+      'towercontrol_manual_2024-01-01.db'
+    );
+    vi.mocked(fs.stat).mockResolvedValue({
+      size: 1024,
+      birthtime: new Date(),
+    } as any);
+    vi.mocked(fs.readdir).mockResolvedValue([]);
+    vi.mocked(userPreferencesService.getAllPreferences).mockResolvedValue({
+      viewPreferences: {},
+    } as any);
+    vi.mocked(userPreferencesService.getViewPreferences).mockResolvedValue(
+      {} as any
+    );
+  });
+
+  describe('createBackup', () => {
+    it('devrait créer une sauvegarde manuelle', async () => {
+      vi.mocked(BackupUtils.compressFile).mockResolvedValue(
+        '/backups/towercontrol_manual_2024-01-01.db.gz'
+      );
+      vi.mocked(fs.stat).mockResolvedValue({
+        size: 2048,
+        birthtime: new Date(),
+      } as any);
+
+      const result = await backupService.createBackup('manual', true);
+
+      expect(result).not.toBeNull();
+      expect(result?.type).toBe('manual');
+      expect(result?.status).toBe('success');
+      expect(result?.filename).toContain('towercontrol_manual');
+    });
+
+    it('devrait créer une sauvegarde automatique', async () => {
+      vi.mocked(BackupUtils.compressFile).mockResolvedValue(
+        '/backups/towercontrol_automatic_2024-01-01.db.gz'
+      );
+
+      const result = await backupService.createBackup('automatic', true);
+
+      expect(result).not.toBeNull();
+      expect(result?.type).toBe('automatic');
+    });
+
+    it('devrait retourner null si pas de changements et forceCreate=false', async () => {
+      // Mock pour simuler qu'il n'y a pas de changements
+      vi.mocked(fs.readdir).mockResolvedValue([
+        'towercontrol_manual_2024-01-01.db.gz',
+      ] as any);
+      vi.mocked(BackupUtils.calculateFileHash).mockResolvedValue('samehash');
+      vi.mocked(fs.readFile).mockResolvedValue(
+        JSON.stringify({ databaseHash: 'samehash' })
+      );
+
+      const result = await backupService.createBackup('automatic', false);
+
+      // Si pas de changements, devrait retourner null
+      expect(result).toBeNull();
+    });
+
+    it('devrait gérer les erreurs lors de la création', async () => {
+      vi.mocked(BackupUtils.createSQLiteBackup).mockRejectedValue(
+        new Error('Backup failed')
+      );
+
+      const result = await backupService.createBackup('manual', true);
+
+      expect(result).not.toBeNull();
+      expect(result?.status).toBe('failed');
+      expect(result?.error).toBeDefined();
+    });
+  });
+
+  describe('listBackups', () => {
+    it('devrait lister les sauvegardes disponibles', async () => {
+      vi.mocked(fs.readdir).mockResolvedValue([
+        'towercontrol_manual_2024-01-01.db.gz',
+        'towercontrol_automatic_2024-01-02.db.gz',
+      ] as any);
+
+      const backups = await backupService.listBackups();
+
+      expect(backups).toHaveLength(2);
+      expect(backups[0].filename).toContain('towercontrol_');
+    });
+
+    it('devrait retourner une liste vide si aucun backup', async () => {
+      vi.mocked(fs.readdir).mockResolvedValue([]);
+
+      const backups = await backupService.listBackups();
+
+      expect(backups).toHaveLength(0);
+    });
+
+    it('devrait filtrer les fichiers non-backup', async () => {
+      vi.mocked(fs.readdir).mockResolvedValue([
+        'towercontrol_manual_2024-01-01.db.gz',
+        'other_file.txt',
+        'backup.log',
+      ] as any);
+
+      const backups = await backupService.listBackups();
+
+      expect(backups).toHaveLength(1);
+    });
+
+    it('devrait gérer les erreurs', async () => {
+      (fs.readdir as any).mockRejectedValue(new Error('Read error'));
+
+      const backups = await backupService.listBackups();
+
+      expect(backups).toHaveLength(0);
+    });
+  });
+
+  describe('deleteBackup', () => {
+    it('devrait supprimer un backup et ses métadonnées', async () => {
+      await backupService.deleteBackup('backup.db.gz');
+
+      expect(fs.unlink).toHaveBeenCalledWith(
+        path.join('/backups', 'backup.db.gz')
+      );
+      expect(fs.unlink).toHaveBeenCalledWith(
+        path.join('/backups', 'backup.db.gz.meta.json')
+      );
+    });
+
+    it('devrait gérer les erreurs lors de la suppression', async () => {
+      vi.mocked(fs.unlink).mockRejectedValue(new Error('Delete failed'));
+
+      await expect(
+        backupService.deleteBackup('backup.db.gz')
+      ).rejects.toThrow();
+    });
+  });
+
+  describe('restoreBackup', () => {
+    beforeEach(() => {
+      vi.mocked(prisma.$queryRaw).mockResolvedValue([
+        { integrity_check: 'ok' },
+      ]);
+      vi.spyOn(backupService, 'createBackup').mockResolvedValue({
+        id: 'pre-restore',
+        filename: 'pre-restore.db.gz',
+        size: 1024,
+        createdAt: new Date(),
+        type: 'manual',
+        status: 'success',
+      } as any);
+    });
+
+    it('devrait restaurer un backup non compressé', async () => {
+      vi.mocked(fs.access).mockResolvedValue(undefined);
+      vi.mocked(fs.copyFile).mockResolvedValue(undefined);
+
+      await backupService.restoreBackup('backup.db');
+
+      expect(fs.copyFile).toHaveBeenCalled();
+      expect(prisma.$connect).toHaveBeenCalled();
+    });
+
+    it('devrait décompresser et restaurer un backup compressé', async () => {
+      vi.mocked(fs.access).mockResolvedValue(undefined);
+      vi.mocked(BackupUtils.decompressFileTemp).mockResolvedValue(undefined);
+      vi.mocked(fs.copyFile).mockResolvedValue(undefined);
+      vi.mocked(fs.unlink).mockResolvedValue(undefined);
+
+      await backupService.restoreBackup('backup.db.gz');
+
+      expect(BackupUtils.decompressFileTemp).toHaveBeenCalled();
+      expect(fs.copyFile).toHaveBeenCalled();
+    });
+
+    it('devrait gérer les erreurs lors de la restauration', async () => {
+      vi.mocked(fs.access).mockRejectedValue(new Error('File not found'));
+
+      await expect(backupService.restoreBackup('backup.db')).rejects.toThrow();
+    });
+  });
+
+  describe('verifyDatabaseHealth', () => {
+    it("devrait vérifier l'intégrité de la base de données", async () => {
+      vi.mocked(prisma.$queryRaw).mockResolvedValue([
+        { integrity_check: 'ok' },
+      ]);
+
+      await backupService.verifyDatabaseHealth();
+
+      expect(prisma.$queryRaw).toHaveBeenCalled();
+    });
+
+    it("devrait échouer si l'intégrité est compromise", async () => {
+      vi.mocked(prisma.$queryRaw).mockResolvedValue([
+        { integrity_check: 'error in database' },
+      ]);
+
+      await expect(backupService.verifyDatabaseHealth()).rejects.toThrow();
+    });
+  });
+
+  describe('hasChangedSinceLastBackup', () => {
+    it('devrait retourner true si aucun backup précédent', async () => {
+      vi.mocked(fs.readdir).mockResolvedValue([]);
+
+      const hasChanged = await backupService.hasChangedSinceLastBackup();
+
+      expect(hasChanged).toBe(true);
+    });
+
+    it('devrait retourner true si le hash a changé', async () => {
+      vi.mocked(fs.readdir).mockResolvedValue([
+        'towercontrol_manual_2024-01-01.db.gz',
+      ] as any);
+      vi.mocked(BackupUtils.calculateFileHash)
+        .mockResolvedValueOnce('newhash')
+        .mockResolvedValueOnce('oldhash');
+      vi.mocked(fs.readFile).mockResolvedValue(
+        JSON.stringify({ databaseHash: 'oldhash' })
+      );
+
+      const hasChanged = await backupService.hasChangedSinceLastBackup();
+
+      expect(hasChanged).toBe(true);
+    });
+  });
+
+  describe('getBackupLogs', () => {
+    it('devrait lire les logs de backup', async () => {
+      vi.mocked(fs.readFile).mockResolvedValue(
+        '2024-01-01: Backup created\n2024-01-02: Backup created'
+      );
+
+      const logs = await backupService.getBackupLogs();
+
+      expect(logs).toHaveLength(2);
+    });
+
+    it("devrait retourner une liste vide si le fichier n'existe pas", async () => {
+      (fs.readFile as any).mockRejectedValue(new Error('File not found'));
+
+      const logs = await backupService.getBackupLogs();
+
+      expect(logs).toHaveLength(0);
+    });
+
+    it('devrait limiter le nombre de lignes', async () => {
+      const manyLines = Array.from({ length: 200 }, (_, i) => `Line ${i}`).join(
+        '\n'
+      );
+      vi.mocked(fs.readFile).mockResolvedValue(manyLines);
+
+      const logs = await backupService.getBackupLogs(50);
+
+      expect(logs.length).toBeLessThanOrEqual(50);
+    });
+  });
+
+  describe('getBackupStats', () => {
+    it('devrait calculer les statistiques par jour', async () => {
+      const now = new Date('2024-01-15');
+      vi.useFakeTimers();
+      vi.setSystemTime(now);
+
+      vi.mocked(fs.readdir).mockResolvedValue([
+        'towercontrol_manual_2024-01-15.db.gz',
+        'towercontrol_automatic_2024-01-15.db.gz',
+        'towercontrol_manual_2024-01-14.db.gz',
+      ] as any);
+      vi.mocked(BackupUtils.parseBackupFilename)
+        .mockReturnValueOnce({
+          type: 'manual',
+          date: new Date('2024-01-15'),
+        })
+        .mockReturnValueOnce({
+          type: 'automatic',
+          date: new Date('2024-01-15'),
+        })
+        .mockReturnValueOnce({
+          type: 'manual',
+          date: new Date('2024-01-14'),
+        });
+
+      const stats = await backupService.getBackupStats(7);
+
+      expect(stats.length).toBeGreaterThan(0);
+      const todayStats = stats.find((s) => s.date === '2024-01-15');
+      expect(todayStats).toBeDefined();
+      expect(todayStats?.manual).toBe(1);
+      expect(todayStats?.automatic).toBe(1);
+
+      vi.useRealTimers();
+    });
+  });
+
+  describe('getConfig', () => {
+    it('devrait retourner la configuration', async () => {
+      const config = await backupService.getConfig();
+
+      expect(config).toHaveProperty('enabled');
+      expect(config).toHaveProperty('interval');
+      expect(config).toHaveProperty('maxBackups');
+      expect(config).toHaveProperty('backupPath');
+    });
+  });
+
+  describe('updateConfig', () => {
+    it('devrait mettre à jour la configuration', async () => {
+      vi.mocked(prisma.userPreferences.upsert).mockResolvedValue({
+        userId: 'default',
+      } as any);
+
+      await backupService.updateConfig({ maxBackups: 10 });
+
+      expect(prisma.userPreferences.upsert).toHaveBeenCalled();
+    });
+  });
+});