diff --git a/lib/core/extension/numx.dart b/lib/core/extension/numx.dart
index efee581c..8bf6744e 100644
--- a/lib/core/extension/numx.dart
+++ b/lib/core/extension/numx.dart
@@ -1,5 +1,5 @@
 extension NumX on num {
-  String get convertBytes {
+  String get bytes2Str {
     const suffix = ['B', 'KB', 'MB', 'GB', 'TB'];
     double value = toDouble();
     int squareTimes = 0;
@@ -12,10 +12,12 @@ extension NumX on num {
     }
     return '$finalValue ${suffix[squareTimes]}';
   }
+
+  String get kb2Str => (this * 1024).bytes2Str;
 }
 
 extension BigIntX on BigInt {
-  String get convertBytes {
+  String get bytes2Str {
     const suffix = ['B', 'KB', 'MB', 'GB', 'TB'];
     double value = toDouble();
     int squareTimes = 0;
@@ -28,4 +30,6 @@ extension BigIntX on BigInt {
     }
     return '$finalValue ${suffix[squareTimes]}';
   }
+
+  String get kb2Str => (this * BigInt.from(1024)).bytes2Str;
 }
diff --git a/lib/data/model/app/shell_func.dart b/lib/data/model/app/shell_func.dart
index c0f98411..ab4658c9 100644
--- a/lib/data/model/app/shell_func.dart
+++ b/lib/data/model/app/shell_func.dart
@@ -214,7 +214,7 @@ const _statusCmds = [
   'cat /proc/stat | grep cpu',
   'uptime',
   'cat /proc/net/snmp',
-  'df -h',
+  'df -B 1K',
   "cat /proc/meminfo | grep -E 'Mem|Swap'",
   'cat /sys/class/thermal/thermal_zone*/type',
   'cat /sys/class/thermal/thermal_zone*/temp',
@@ -246,7 +246,7 @@ const _bsdStatusCmd = [
   'uname -or',
   'top -l 1 | grep "CPU usage"',
   'uptime',
-  'df -h',
+  'df -k',
   'top -l 1 | grep PhysMem',
   //'sysctl -a | grep temperature',
   'hostname',
diff --git a/lib/data/model/container/image.dart b/lib/data/model/container/image.dart
index b3a8a5f2..86bdb295 100644
--- a/lib/data/model/container/image.dart
+++ b/lib/data/model/container/image.dart
@@ -34,7 +34,7 @@ final class PodmanImg implements ContainerImg {
   });
 
   @override
-  String? get sizeMB => size?.convertBytes;
+  String? get sizeMB => size?.bytes2Str;
 
   @override
   int? get containersCount => containers;
diff --git a/lib/data/model/server/disk.dart b/lib/data/model/server/disk.dart
index b9a3bb71..df6485d1 100644
--- a/lib/data/model/server/disk.dart
+++ b/lib/data/model/server/disk.dart
@@ -7,9 +7,9 @@ class Disk {
   final String dev;
   final String mount;
   final int usedPercent;
-  final String used;
-  final String size;
-  final String avail;
+  final BigInt used;
+  final BigInt size;
+  final BigInt avail;
 
   const Disk({
     required this.dev,
@@ -20,6 +20,12 @@ class Disk {
     required this.avail,
   });
 
+  /// raw:
+  /// ```
+  /// Filesystem           1K-blocks      Used Available Use% Mounted on
+  /// overlay              959122528 154470540 755857572  17% /
+  /// tmpfs                    65536         0     65536   0% /dev
+  /// ```
   static List<Disk> parse(String raw) {
     final list = <Disk>[];
     final items = raw.split('\n');
@@ -43,9 +49,9 @@ class Disk {
           dev: vals[0],
           mount: vals[5],
           usedPercent: int.parse(vals[4].replaceFirst('%', '')),
-          used: vals[2],
-          size: vals[1],
-          avail: vals[3],
+          used: BigInt.tryParse(vals[2]) ?? BigInt.zero,
+          size: BigInt.tryParse(vals[1]) ?? BigInt.one,
+          avail: BigInt.tryParse(vals[3]) ?? BigInt.one,
         ));
       } catch (e) {
         continue;
@@ -79,8 +85,8 @@ class DiskIO extends TimeSeq<DiskIOPiece> {
   (String?, String?) getSpeed(String dev) {
     final (read_, write_) = _getSpeed(dev);
     if (read_ == null || write_ == null) return (null, null);
-    final read = '${read_.convertBytes}/s';
-    final write = '${write_.convertBytes}/s';
+    final read = '${read_.bytes2Str}/s';
+    final write = '${write_.bytes2Str}/s';
     return (read, write);
   }
 
@@ -92,8 +98,8 @@ class DiskIO extends TimeSeq<DiskIOPiece> {
       read += read_ ?? 0;
       write += write_ ?? 0;
     }
-    final readStr = '${read.convertBytes}/s';
-    final writeStr = '${write.convertBytes}/s';
+    final readStr = '${read.bytes2Str}/s';
+    final writeStr = '${write.bytes2Str}/s';
     return (readStr, writeStr);
   }
 
diff --git a/lib/data/model/server/net_speed.dart b/lib/data/model/server/net_speed.dart
index 03e269c8..5f7290b5 100644
--- a/lib/data/model/server/net_speed.dart
+++ b/lib/data/model/server/net_speed.dart
@@ -47,10 +47,10 @@ class NetSpeed extends TimeSeq<NetSpeedPart> {
       for (var i = 0; i < now.length; i++) {
         size += sizeInBytes(i);
       }
-      return size.convertBytes;
+      return size.bytes2Str;
     }
     final idx = deviceIdx(device);
-    return sizeInBytes(idx).convertBytes;
+    return sizeInBytes(idx).bytes2Str;
   }
 
   String speedOut({String? device, bool all = false}) {
@@ -73,10 +73,10 @@ class NetSpeed extends TimeSeq<NetSpeedPart> {
       for (var i = 0; i < now.length; i++) {
         size += sizeOutBytes(i);
       }
-      return size.convertBytes;
+      return size.bytes2Str;
     }
     final idx = deviceIdx(device);
-    return sizeOutBytes(idx).convertBytes;
+    return sizeOutBytes(idx).bytes2Str;
   }
 
   int deviceIdx(String? device) {
@@ -90,7 +90,7 @@ class NetSpeed extends TimeSeq<NetSpeedPart> {
     return 0;
   }
 
-  String buildStandardOutput(double speed) => '${speed.convertBytes}/s';
+  String buildStandardOutput(double speed) => '${speed.bytes2Str}/s';
 
   /// [raw] example:
   /// Inter-|   Receive                                                |  Transmit
diff --git a/lib/data/res/status.dart b/lib/data/res/status.dart
index 98b7e9be..7f2aa5c9 100644
--- a/lib/data/res/status.dart
+++ b/lib/data/res/status.dart
@@ -41,13 +41,13 @@ abstract final class InitStatus {
           avail: 1,
         ),
         disk: [
-          const Disk(
+          Disk(
             dev: '/',
             mount: '/',
             usedPercent: 0,
-            used: '0',
-            size: '0',
-            avail: '0',
+            used: BigInt.zero,
+            size: BigInt.one,
+            avail: BigInt.zero,
           )
         ],
         tcp: const Conn(maxConn: 0, active: 0, passive: 0, fail: 0),
diff --git a/lib/view/page/private_key/edit.dart b/lib/view/page/private_key/edit.dart
index 1340933a..4818d5a5 100644
--- a/lib/view/page/private_key/edit.dart
+++ b/lib/view/page/private_key/edit.dart
@@ -193,8 +193,8 @@ class _PrivateKeyEditPageState extends State<PrivateKeyEditPage> {
               context.showSnackBar(
                 l10n.fileTooLarge(
                   path,
-                  size.convertBytes,
-                  Miscs.privateKeyMaxSize.convertBytes,
+                  size.bytes2Str,
+                  Miscs.privateKeyMaxSize.bytes2Str,
                 ),
               );
               return;
diff --git a/lib/view/page/server/detail.dart b/lib/view/page/server/detail.dart
index 5d657d42..8205f6c5 100644
--- a/lib/view/page/server/detail.dart
+++ b/lib/view/page/server/detail.dart
@@ -256,7 +256,7 @@ class _ServerDetailPageState extends State<ServerDetailPage>
                     ),
                     UIs.width7,
                     Text(
-                      'of ${(ss.mem.total * 1024).convertBytes}',
+                      'of ${(ss.mem.total * 1024).bytes2Str}',
                       style: UIs.text13Grey,
                     )
                   ],
@@ -297,7 +297,7 @@ class _ServerDetailPageState extends State<ServerDetailPage>
                     Text('${used.toStringAsFixed(0)}%', style: UIs.text27),
                     UIs.width7,
                     Text(
-                      'of ${(ss.swap.total * 1024).convertBytes} ',
+                      'of ${(ss.swap.total * 1024).bytes2Str} ',
                       style: UIs.text13Grey,
                     )
                   ],
@@ -452,7 +452,7 @@ class _ServerDetailPageState extends State<ServerDetailPage>
   Widget _buildDiskItem(Disk disk, ServerStatus ss) {
     final (read, write) = ss.diskIO.getSpeed(disk.dev);
     final text = () {
-      final use = '${disk.used} / ${disk.size}';
+      final use = '${disk.used.kb2Str} / ${disk.size.kb2Str}';
       if (read == null || write == null) return use;
       return '$use\n${l10n.read} $read | ${l10n.write} $write';
     }();
diff --git a/lib/view/page/storage/local.dart b/lib/view/page/storage/local.dart
index 3ad07f1c..44c31cf1 100644
--- a/lib/view/page/storage/local.dart
+++ b/lib/view/page/storage/local.dart
@@ -182,7 +182,7 @@ class _LocalStoragePageState extends State<LocalStoragePage> {
             title: Text(fileName),
             subtitle: isDir
                 ? null
-                : Text(stat.size.convertBytes, style: UIs.textGrey),
+                : Text(stat.size.bytes2Str, style: UIs.textGrey),
             trailing: Text(
               stat.modified
                   .toString()
diff --git a/lib/view/page/storage/sftp.dart b/lib/view/page/storage/sftp.dart
index d4b75f3d..f6f1c0c9 100644
--- a/lib/view/page/storage/sftp.dart
+++ b/lib/view/page/storage/sftp.dart
@@ -304,7 +304,7 @@ class _SftpPageState extends State<SftpPage> with AfterLayoutMixin {
         subtitle: isDir
             ? null
             : Text(
-                (file.attr.size ?? 0).convertBytes,
+                (file.attr.size ?? 0).bytes2Str,
                 style: UIs.textGrey,
               ),
         onTap: () {
diff --git a/lib/view/page/storage/sftp_mission.dart b/lib/view/page/storage/sftp_mission.dart
index ce47ee3c..05696410 100644
--- a/lib/view/page/storage/sftp_mission.dart
+++ b/lib/view/page/storage/sftp_mission.dart
@@ -94,7 +94,7 @@ class _SftpMissionPageState extends State<SftpMissionPage> {
         );
       case SftpWorkerStatus.loading:
         final percentStr = (status.progress ?? 0.0).toStringAsFixed(2);
-        final size = (status.size ?? 0).convertBytes;
+        final size = (status.size ?? 0).bytes2Str;
         return _wrapInCard(
           status: status,
           subtitle: l10n.percentOfSize(percentStr, size),