diff --git a/lib/data/model/server/disk.dart b/lib/data/model/server/disk.dart
index a616ba07..dba3c870 100644
--- a/lib/data/model/server/disk.dart
+++ b/lib/data/model/server/disk.dart
@@ -41,7 +41,8 @@ class Disk {
       }
       try {
         final dev = vals[0];
-        if (!dev.startsWith('/dev')) continue;
+        // Some NAS may have mounted path like this `//192.168.1.2/`
+        if (!_shouldCalc(dev)) continue;
         list.add(Disk(
           dev: dev,
           mount: vals[5],
@@ -161,7 +162,7 @@ class DiskUsage {
     var used = BigInt.zero;
     var size = BigInt.zero;
     for (var disk in disks) {
-      if (!disk.dev.startsWith('/dev')) continue;
+      if (!_shouldCalc(disk.dev)) continue;
       if (devs.contains(disk.dev)) continue;
       devs.add(disk.dev);
       used += disk.used;
@@ -170,3 +171,9 @@ class DiskUsage {
     return DiskUsage(used: used, size: size);
   }
 }
+
+bool _shouldCalc(String dev) {
+  if (dev.startsWith('/dev')) return true;
+  if (dev.startsWith('//')) return true;
+  return false;
+}
diff --git a/lib/data/model/server/server_private_info.dart b/lib/data/model/server/server_private_info.dart
index cd6e9841..d5cc5a0f 100644
--- a/lib/data/model/server/server_private_info.dart
+++ b/lib/data/model/server/server_private_info.dart
@@ -48,20 +48,31 @@ class ServerPrivateInfo {
     this.jumpId,
   }) : id = '$user@$ip:$port';
 
-  ServerPrivateInfo.fromJson(Map<String, dynamic> json)
-      : ip = json["ip"].toString(),
-        port = json["port"] ?? 22,
-        user = json["user"]?.toString() ?? 'root',
-        id =
-            '${json["user"]?.toString() ?? "root"}@${json["ip"].toString()}:${json["port"] ?? 22}',
-        name = json["name"]?.toString() ??
-            '${json["user"]?.toString() ?? 'root'}@${json["ip"].toString()}:${json["port"] ?? 22}',
-        pwd = json["authorization"]?.toString(),
-        keyId = json["pubKeyId"]?.toString(),
-        tags = json["tags"]?.cast<String>(),
-        alterUrl = json["alterUrl"]?.toString(),
-        autoConnect = json["autoConnect"],
-        jumpId = json["jumpId"];
+  static ServerPrivateInfo fromJson(Map<String, dynamic> json) {
+    final ip = json["ip"] as String? ?? '';
+    final port = json["port"] as int? ?? 22;
+    final user = json["user"] as String? ?? 'root';
+    final name = json["name"] as String? ?? '';
+    final pwd = json["authorization"] as String?;
+    final keyId = json["pubKeyId"] as String?;
+    final tags = (json["tags"] as List?)?.cast<String>();
+    final alterUrl = json["alterUrl"] as String?;
+    final autoConnect = json["autoConnect"] as bool?;
+    final jumpId = json["jumpId"] as String?;
+
+    return ServerPrivateInfo(
+      name: name,
+      ip: ip,
+      port: port,
+      user: user,
+      pwd: pwd,
+      keyId: keyId,
+      tags: tags,
+      alterUrl: alterUrl,
+      autoConnect: autoConnect,
+      jumpId: jumpId,
+    );
+  }
 
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> data = <String, dynamic>{};