diff --git a/backup_box/config.py b/backup_box/config.py
index 3d14142..0ef1637 100644
--- a/backup_box/config.py
+++ b/backup_box/config.py
@@ -5,7 +5,8 @@ from tomli_w import dump as toml_dump
 from typing import TypedDict, Literal
 
 EntryItem = TypedDict("EntryItem", {
-    "source": str,
+    "name": str,
+    "sources": list[str],
     "included": list[str],
     "ignored": list[str],
 })
@@ -24,7 +25,6 @@ RemoteStorageItem = TypedDict("RemoteStorageItem", {
 StorageItem = LocalStorageItem | RemoteStorageItem
 
 ConfigDict = TypedDict("ConfigDict", {
-    "_config": list[str],
     "entry": dict[str, EntryItem],
     "storage": dict[str, StorageItem],
 })
@@ -35,10 +35,10 @@ def _new_config() -> ConfigDict:
     return {
         "entry": {},
         "storage": {},
-        "_config": [],
     }
 
 _cfg: ConfigDict = _new_config()
+_config: list[str] = []
 
 def _override_dict(target: ConfigDict, top_dict: ConfigDict):
     for k, v in top_dict.items():
@@ -54,23 +54,21 @@ def apply_user_config(dir_or_path: str):
     if _pth.isdir(dir_or_path):
         dir_or_path = _pth.abspath(_pth.join(dir_or_path, CONFIG_FILE_NAME))
     cfg_dir = _pth.dirname(dir_or_path)
-    if dir_or_path in _cfg["_config"]:
+    if dir_or_path in _config:
         return # skip if already added
     try:
         with open(dir_or_path, "rb") as f:
             config: ConfigDict = toml_load(f) # type: ignore
     except:
         config: ConfigDict = {} # type: ignore
-    # ignore config file list
-    if "_config" in config:
-        del config["_config"] # type: ignore
     # ensure default value
     config.setdefault("entry", {})
     for item in config["entry"].values():
-        item.setdefault("source", "")
+        item.setdefault("name", "")
         # path related to the config file.
-        if item["source"]:
-            item["source"] = _path_related_to(cfg_dir, item["source"])
+        item.setdefault("sources", [])
+        for i, s in enumerate(item["sources"]):
+            item["sources"][i] = _path_related_to(cfg_dir, s)
         item.setdefault("included", [])
         item.setdefault("ignored", [])
     config.setdefault("storage", {})
@@ -83,7 +81,7 @@ def apply_user_config(dir_or_path: str):
     # update config
     _override_dict(_cfg, config)
     # append config file list
-    _cfg["_config"].append(dir_or_path)
+    _config.append(dir_or_path)
 
 def init_default_config():
     global _cfg
@@ -93,8 +91,9 @@ def init_default_config():
 
 def reload_config():
     global _cfg
-    cfg_list = _cfg["_config"]
+    cfg_list = _config
     _cfg = _new_config()
+    _config.clear()
     for cfg in cfg_list:
         apply_user_config(cfg)