diff --git a/selfprivacy_api/backup/__init__.py b/selfprivacy_api/backup/__init__.py
index 708d4a5..f89a54e 100644
--- a/selfprivacy_api/backup/__init__.py
+++ b/selfprivacy_api/backup/__init__.py
@@ -194,11 +194,11 @@ class Backups:
     @staticmethod
     def back_up(service: Service):
         """The top-level function to back up a service"""
-        folder = service.get_folders()
+        folders = service.get_folders()
         repo_name = service.get_id()
 
         service.pre_backup()
-        snapshot = Backups.provider().backuper.start_backup(folder, repo_name)
+        snapshot = Backups.provider().backuper.start_backup(folders, repo_name)
         Backups._store_last_snapshot(repo_name, snapshot)
 
         service.post_restore()
@@ -238,9 +238,9 @@ class Backups:
     @staticmethod
     def restore_service_from_snapshot(service: Service, snapshot_id: str):
         repo_name = service.get_id()
-        folder = service.get_folders()
+        folders = service.get_folders()
 
-        Backups.provider().backuper.restore_from_backup(repo_name, snapshot_id, folder)
+        Backups.provider().backuper.restore_from_backup(repo_name, snapshot_id, folders)
 
     @staticmethod
     def restore_snapshot(snapshot: Snapshot):
diff --git a/selfprivacy_api/backup/backuper.py b/selfprivacy_api/backup/backuper.py
index 5bba9d5..908c1fc 100644
--- a/selfprivacy_api/backup/backuper.py
+++ b/selfprivacy_api/backup/backuper.py
@@ -13,7 +13,7 @@ class AbstractBackuper(ABC):
         raise NotImplementedError
 
     @abstractmethod
-    def start_backup(self, folder: str, repo_name: str):
+    def start_backup(self, folders: List[str], repo_name: str):
         raise NotImplementedError
 
     @abstractmethod
@@ -26,7 +26,7 @@ class AbstractBackuper(ABC):
         raise NotImplementedError
 
     @abstractmethod
-    def restore_from_backup(self, repo_name: str, snapshot_id: str, folder: str):
+    def restore_from_backup(self, repo_name: str, snapshot_id: str, folders: List[str]):
         """Restore a target folder using a snapshot"""
         raise NotImplementedError
 
diff --git a/selfprivacy_api/backup/restic_backuper.py b/selfprivacy_api/backup/restic_backuper.py
index cc81361..2af7d44 100644
--- a/selfprivacy_api/backup/restic_backuper.py
+++ b/selfprivacy_api/backup/restic_backuper.py
@@ -57,15 +57,19 @@ class ResticBackuper(AbstractBackuper):
             command.extend(args)
         return command
 
-    def start_backup(self, folder: str, repo_name: str):
+    def start_backup(self, folders: List[str], repo_name: str):
         """
         Start backup with restic
         """
+
+        # but maybe it is ok to accept a union of a string and an array of strings
+        assert not isinstance(folders, str)
+
         backup_command = self.restic_command(
             repo_name,
             "backup",
             "--json",
-            folder,
+            folders[0],
         )
         with subprocess.Popen(
             backup_command,
@@ -145,7 +149,7 @@ class ResticBackuper(AbstractBackuper):
             except ValueError as e:
                 raise ValueError("cannot restore a snapshot: " + output) from e
 
-    def restore_from_backup(self, repo_name, snapshot_id, folder):
+    def restore_from_backup(self, repo_name, snapshot_id, folders):
         """
         Restore from backup with restic
         """
diff --git a/selfprivacy_api/services/test_service/__init__.py b/selfprivacy_api/services/test_service/__init__.py
index 2906244..e790be9 100644
--- a/selfprivacy_api/services/test_service/__init__.py
+++ b/selfprivacy_api/services/test_service/__init__.py
@@ -1,6 +1,7 @@
 """Class representing Bitwarden service"""
 import base64
 import typing
+from typing import List
 
 from selfprivacy_api.jobs import Job
 from selfprivacy_api.services.service import Service, ServiceDnsRecord, ServiceStatus
@@ -111,9 +112,8 @@ class DummyService(Service):
         return "sda1"
 
     @classmethod
-    def get_folders(cls) -> str:
-        # for now only a single folder
-        return cls.location
+    def get_folders(cls) -> List[str]:
+        return [cls.location]
 
     @staticmethod
     def get_dns_records() -> typing.List[ServiceDnsRecord]:
diff --git a/tests/test_graphql/test_backup.py b/tests/test_graphql/test_backup.py
index 9c8af3f..460fa44 100644
--- a/tests/test_graphql/test_backup.py
+++ b/tests/test_graphql/test_backup.py
@@ -143,10 +143,10 @@ def test_one_snapshot(backups, dummy_service):
 
 
 def test_backup_returns_snapshot(backups, dummy_service):
-    service_folder = dummy_service.get_folders()
+    service_folders = dummy_service.get_folders()
     provider = Backups.provider()
     name = dummy_service.get_id()
-    snapshot = provider.backuper.start_backup(service_folder, name)
+    snapshot = provider.backuper.start_backup(service_folders, name)
 
     assert snapshot.id is not None
     assert snapshot.service_name == name
@@ -154,7 +154,7 @@ def test_backup_returns_snapshot(backups, dummy_service):
 
 
 def test_restore(backups, dummy_service):
-    service_folder = dummy_service.get_folders()
+    service_folder = dummy_service.get_folders()[0]
     file_to_nuke = listdir(service_folder)[0]
     assert file_to_nuke is not None
     path_to_nuke = path.join(service_folder, file_to_nuke)