diff --git a/sdks/storage/models.go b/sdks/storage/models.go
index 2af3c4d..b6ed0fb 100644
--- a/sdks/storage/models.go
+++ b/sdks/storage/models.go
@@ -3,6 +3,7 @@ package cdssdk
 import (
 	"database/sql/driver"
 	"fmt"
+	"time"
 
 	"gitlink.org.cn/cloudream/common/pkgs/types"
 	"gitlink.org.cn/cloudream/common/utils/serder"
@@ -113,6 +114,12 @@ type Object struct {
 	Redundancy Redundancy `db:"Redundancy" json:"redundancy"`
 }
 
+type PinnedObject struct {
+	ObjectID   ObjectID  `db:"ObjectID" json:"objectID"`
+	NodeID     NodeID    `db:"NodeID" json:"nodeID"`
+	CreateTime time.Time `db:"CreateTime" json:"createTime"`
+}
+
 type NodePackageCachingInfo struct {
 	NodeID      NodeID `json:"nodeID"`
 	FileSize    int64  `json:"fileSize"`