diff --git a/README.md b/README.md
index 9f93c50..5c93e5b 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,22 @@ with Actual(
         print(t.date, account_name, t.notes, t.amount, category)
 ```
 
+The `file` will be matched to either one of the following:
+
+- The name of the budget, found top the top left cornet
+- The ID of the budget, a UUID that is only available if you inspect the result of the method `list_user_files`
+- The Sync ID of the budget, a UUID available on the frontend on the "Advanced options"
+- If none of those options work for you, you can search for the file manually with `list_user_files` and provide the
+object directly:
+
+```python
+from actual import Actual
+
+with Actual("http://localhost:5006", password="mypass") as actual:
+    actual.set_file(actual.list_user_files().data[0])
+    actual.download_budget()
+```
+
 ## Adding new transactions
 
 After you created your first budget (or when updating an existing budget), you can add new transactions by adding them
diff --git a/actual/__init__.py b/actual/__init__.py
index 385059e..3ae112c 100644
--- a/actual/__init__.py
+++ b/actual/__init__.py
@@ -103,8 +103,11 @@ def session(self) -> Session:
         return self._session
 
     def set_file(self, file_id: Union[str, RemoteFileListDTO]) -> RemoteFileListDTO:
-        """Sets the file id for the class for further requests. The file_id argument can be either a name or remote
-        id from the file. If the name is provided, only the first match is taken."""
+        """
+        Sets the file id for the class for further requests. The file_id argument can be either the name, the remote
+        id or the group id (also known as sync_id) from the file. If there are duplicates for the name, this method
+        will raise `UnknownFileId`.
+        """
         if isinstance(file_id, RemoteFileListDTO):
             self._file = file_id
             return file_id
@@ -112,7 +115,7 @@ def set_file(self, file_id: Union[str, RemoteFileListDTO]) -> RemoteFileListDTO:
             selected_files = []
             user_files = self.list_user_files()
             for file in user_files.data:
-                if (file.file_id == file_id or file.name == file_id) and file.deleted == 0:
+                if (file.file_id == file_id or file.name == file_id or file.group_id == file_id) and file.deleted == 0:
                     selected_files.append(file)
             if len(selected_files) == 0:
                 raise UnknownFileId(f"Could not find a file id or identifier '{file_id}'")