diff --git a/utils/storage/storages/example-data/global_data_file_test.stock b/utils/storage/storages/example-data/global_data_file_test.stock
new file mode 100644
index 0000000..7359430
--- /dev/null
+++ b/utils/storage/storages/example-data/global_data_file_test.stock
@@ -0,0 +1 @@
+{"CreateAt":"2023-07-19T14:49:35.7235348+08:00","TotalCount":10}
\ No newline at end of file
diff --git a/utils/storage/storages/example-data/index_data_file_test.INDEX_001.stock b/utils/storage/storages/example-data/index_data_file_test.INDEX_001.stock
new file mode 100644
index 0000000..c730b47
--- /dev/null
+++ b/utils/storage/storages/example-data/index_data_file_test.INDEX_001.stock
@@ -0,0 +1 @@
+{"ID":"INDEX_001","Value":10}
\ No newline at end of file
diff --git a/utils/storage/storages/global_data_file_example_test.go b/utils/storage/storages/global_data_file_example_test.go
new file mode 100644
index 0000000..a9f3186
--- /dev/null
+++ b/utils/storage/storages/global_data_file_example_test.go
@@ -0,0 +1,19 @@
+package storages_test
+
+import (
+	"fmt"
+	"github.com/kercylan98/minotaur/utils/storage/storages"
+	"time"
+)
+
+func ExampleNewGlobalDataFileStorage() {
+	storage := storages.NewGlobalDataFileStorage[*GlobalData](".", func(name string) *GlobalData {
+		return &GlobalData{
+			CreateAt: time.Now(),
+		}
+	})
+
+	fmt.Println(storage != nil)
+	// Output:
+	// true
+}
diff --git a/utils/storage/storages/global_data_file_test.go b/utils/storage/storages/global_data_file_test.go
new file mode 100644
index 0000000..9241893
--- /dev/null
+++ b/utils/storage/storages/global_data_file_test.go
@@ -0,0 +1,42 @@
+package storages_test
+
+import (
+	"github.com/kercylan98/minotaur/utils/storage"
+	"github.com/kercylan98/minotaur/utils/storage/storages"
+	. "github.com/smartystreets/goconvey/convey"
+	"testing"
+	"time"
+)
+
+type GlobalData struct {
+	CreateAt   time.Time
+	TotalCount int
+}
+
+func TestGlobalDataFileStorage_Save(t *testing.T) {
+	Convey("TestGlobalDataFileStorage_Save", t, func() {
+		data := storage.NewGlobalData[*GlobalData]("global_data_file_test", storages.NewGlobalDataFileStorage[*GlobalData]("./example-data", func(name string) *GlobalData {
+			return &GlobalData{
+				CreateAt: time.Now(),
+			}
+		}))
+		data.Handle(func(name string, data *GlobalData) {
+			data.TotalCount = 10
+		})
+		if err := data.SaveData(); err != nil {
+			t.Fatal(err)
+		}
+		So(data.GetData().TotalCount, ShouldEqual, 10)
+	})
+}
+
+func TestGlobalDataFileStorage_Load(t *testing.T) {
+	Convey("TestGlobalDataFileStorage_Load", t, func() {
+		data := storage.NewGlobalData[*GlobalData]("global_data_file_test", storages.NewGlobalDataFileStorage[*GlobalData]("./example-data", func(name string) *GlobalData {
+			return &GlobalData{
+				CreateAt: time.Now(),
+			}
+		}))
+		So(data.GetData().TotalCount, ShouldEqual, 10)
+	})
+}
diff --git a/utils/storage/storages/index_data_file_example_test.go b/utils/storage/storages/index_data_file_example_test.go
new file mode 100644
index 0000000..f6c865d
--- /dev/null
+++ b/utils/storage/storages/index_data_file_example_test.go
@@ -0,0 +1,18 @@
+package storages_test
+
+import (
+	"fmt"
+	"github.com/kercylan98/minotaur/utils/storage/storages"
+)
+
+func ExampleNewIndexDataFileStorage() {
+	storage := storages.NewIndexDataFileStorage[string, *IndexData[string]]("./example-data", func(name string, index string) *IndexData[string] {
+		return &IndexData[string]{ID: index}
+	}, func(name string) *IndexData[string] {
+		return new(IndexData[string])
+	})
+
+	fmt.Println(storage != nil)
+	// Output:
+	// true
+}
diff --git a/utils/storage/storages/index_data_file_test.go b/utils/storage/storages/index_data_file_test.go
new file mode 100644
index 0000000..5e12649
--- /dev/null
+++ b/utils/storage/storages/index_data_file_test.go
@@ -0,0 +1,45 @@
+package storages_test
+
+import (
+	"github.com/kercylan98/minotaur/utils/storage"
+	"github.com/kercylan98/minotaur/utils/storage/storages"
+	. "github.com/smartystreets/goconvey/convey"
+	"testing"
+)
+
+type IndexData[I string] struct {
+	ID    I
+	Value int
+}
+
+func (slf *IndexData[I]) GetIndex() I {
+	return slf.ID
+}
+
+func TestIndexDataFileStorage_Save(t *testing.T) {
+	Convey("TestIndexDataFileStorage_Save", t, func() {
+		data := storage.NewIndexData[string, *IndexData[string]]("index_data_file_test", storages.NewIndexDataFileStorage[string, *IndexData[string]]("./example-data", func(name string, index string) *IndexData[string] {
+			return &IndexData[string]{ID: index}
+		}, func(name string) *IndexData[string] {
+			return new(IndexData[string])
+		}))
+		data.Handle("INDEX_001", func(name string, index string, data *IndexData[string]) {
+			data.Value = 10
+		})
+		if err := data.SaveData("INDEX_001"); err != nil {
+			t.Fatal(err)
+		}
+		So(data.GetData("INDEX_001").Value, ShouldEqual, 10)
+	})
+}
+
+func TestIndexDataFileStorage_Load(t *testing.T) {
+	Convey("TestIndexDataFileStorage_Load", t, func() {
+		data := storage.NewIndexData[string, *IndexData[string]]("index_data_file_test", storages.NewIndexDataFileStorage[string, *IndexData[string]]("./example-data", func(name string, index string) *IndexData[string] {
+			return &IndexData[string]{ID: index}
+		}, func(name string) *IndexData[string] {
+			return new(IndexData[string])
+		}))
+		So(data.GetData("INDEX_001").Value, ShouldEqual, 10)
+	})
+}