diff --git a/homeassistant/components/qnap/icons.json b/homeassistant/components/qnap/icons.json
index c83962c3089a1b15bc74fe0ba37494b026f966d2..b359073f48345254b224d25f119e32debb8521ab 100644
--- a/homeassistant/components/qnap/icons.json
+++ b/homeassistant/components/qnap/icons.json
@@ -36,6 +36,18 @@
       },
       "volume_percentage_used": {
         "default": "mdi:chart-pie"
+      },
+      "volume_size_total": {
+        "default": "mdi:chart-pie"
+      },
+      "memory_size": {
+        "default": "mdi:memory"
+      },
+      "network_err": {
+        "default": "mdi:alert"
+      },
+      "network_max_speed": {
+        "default": "mdi:speedometer"
       }
     }
   }
diff --git a/homeassistant/components/qnap/sensor.py b/homeassistant/components/qnap/sensor.py
index 2a5186ad940f7670a33fe982154c3002c659c32f..e1739a900ce5e8485a5fb711ab9dea496b531d2b 100644
--- a/homeassistant/components/qnap/sensor.py
+++ b/homeassistant/components/qnap/sensor.py
@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+from datetime import timedelta
+
 from homeassistant import config_entries
 from homeassistant.components.sensor import (
     SensorDeviceClass,
@@ -22,6 +24,7 @@ from homeassistant.exceptions import PlatformNotReady
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.util import dt as dt_util
 
 from .const import DOMAIN
 from .coordinator import QnapCoordinator
@@ -53,6 +56,13 @@ _SYSTEM_MON_COND: tuple[SensorEntityDescription, ...] = (
         entity_category=EntityCategory.DIAGNOSTIC,
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    SensorEntityDescription(
+        key="uptime",
+        translation_key="uptime",
+        device_class=SensorDeviceClass.TIMESTAMP,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+    ),
 )
 _CPU_MON_COND: tuple[SensorEntityDescription, ...] = (
     SensorEntityDescription(
@@ -74,6 +84,17 @@ _CPU_MON_COND: tuple[SensorEntityDescription, ...] = (
     ),
 )
 _MEMORY_MON_COND: tuple[SensorEntityDescription, ...] = (
+    SensorEntityDescription(
+        key="memory_size",
+        translation_key="memory_size",
+        native_unit_of_measurement=UnitOfInformation.MEBIBYTES,
+        device_class=SensorDeviceClass.DATA_SIZE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        state_class=SensorStateClass.MEASUREMENT,
+        suggested_display_precision=1,
+        suggested_unit_of_measurement=UnitOfInformation.GIBIBYTES,
+    ),
     SensorEntityDescription(
         key="memory_free",
         translation_key="memory_free",
@@ -133,6 +154,22 @@ _NETWORK_MON_COND: tuple[SensorEntityDescription, ...] = (
         suggested_display_precision=1,
         suggested_unit_of_measurement=UnitOfDataRate.MEGABITS_PER_SECOND,
     ),
+    SensorEntityDescription(
+        key="network_err",
+        translation_key="network_err",
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        state_class=SensorStateClass.MEASUREMENT,
+    ),
+    SensorEntityDescription(
+        key="network_max_speed",
+        translation_key="network_max_speed",
+        native_unit_of_measurement=UnitOfDataRate.MEGABITS_PER_SECOND,
+        device_class=SensorDeviceClass.DATA_RATE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        state_class=SensorStateClass.MEASUREMENT,
+    ),
 )
 _DRIVE_MON_COND: tuple[SensorEntityDescription, ...] = (
     SensorEntityDescription(
@@ -152,6 +189,17 @@ _DRIVE_MON_COND: tuple[SensorEntityDescription, ...] = (
     ),
 )
 _VOLUME_MON_COND: tuple[SensorEntityDescription, ...] = (
+    SensorEntityDescription(
+        key="volume_size_total",
+        translation_key="volume_size_total",
+        native_unit_of_measurement=UnitOfInformation.BYTES,
+        device_class=SensorDeviceClass.DATA_SIZE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        entity_registry_enabled_default=False,
+        state_class=SensorStateClass.MEASUREMENT,
+        suggested_display_precision=1,
+        suggested_unit_of_measurement=UnitOfInformation.GIBIBYTES,
+    ),
     SensorEntityDescription(
         key="volume_size_used",
         translation_key="volume_size_used",
@@ -312,6 +360,8 @@ class QNAPMemorySensor(QNAPSensor):
             return free
 
         total = float(self.coordinator.data["system_stats"]["memory"]["total"])
+        if self.entity_description.key == "memory_size":
+            return total
 
         used = total - free
         if self.entity_description.key == "memory_used":
@@ -320,6 +370,8 @@ class QNAPMemorySensor(QNAPSensor):
         if self.entity_description.key == "memory_percent_used":
             return used / total * 100
 
+    # Deprecated since Home Assistant 2024.6.0
+    # Can be removed completely in 2024.12.0
     @property
     def extra_state_attributes(self):
         """Return the state attributes."""
@@ -335,10 +387,16 @@ class QNAPNetworkSensor(QNAPSensor):
     @property
     def native_value(self):
         """Return the state of the sensor."""
+        nic = self.coordinator.data["system_stats"]["nics"][self.monitor_device]
         if self.entity_description.key == "network_link_status":
-            nic = self.coordinator.data["system_stats"]["nics"][self.monitor_device]
             return nic["link_status"]
 
+        if self.entity_description.key == "network_max_speed":
+            return nic["max_speed"]
+
+        if self.entity_description.key == "network_err":
+            return nic["err_packets"]
+
         data = self.coordinator.data["bandwidth"][self.monitor_device]
         if self.entity_description.key == "network_tx":
             return data["tx"]
@@ -346,6 +404,8 @@ class QNAPNetworkSensor(QNAPSensor):
         if self.entity_description.key == "network_rx":
             return data["rx"]
 
+    # Deprecated since Home Assistant 2024.6.0
+    # Can be removed completely in 2024.12.0
     @property
     def extra_state_attributes(self):
         """Return the state attributes."""
@@ -372,6 +432,18 @@ class QNAPSystemSensor(QNAPSensor):
         if self.entity_description.key == "system_temp":
             return int(self.coordinator.data["system_stats"]["system"]["temp_c"])
 
+        if self.entity_description.key == "uptime":
+            uptime = self.coordinator.data["system_stats"]["uptime"]
+            uptime_duration = timedelta(
+                days=uptime["days"],
+                hours=uptime["hours"],
+                minutes=uptime["minutes"],
+                seconds=uptime["seconds"],
+            )
+            return dt_util.now() - uptime_duration
+
+    # Deprecated since Home Assistant 2024.6.0
+    # Can be removed completely in 2024.12.0
     @property
     def extra_state_attributes(self):
         """Return the state attributes."""
@@ -429,6 +501,8 @@ class QNAPVolumeSensor(QNAPSensor):
             return free_gb
 
         total_gb = int(data["total_size"])
+        if self.entity_description.key == "volume_size_total":
+            return total_gb
 
         used_gb = total_gb - free_gb
         if self.entity_description.key == "volume_size_used":
@@ -437,6 +511,8 @@ class QNAPVolumeSensor(QNAPSensor):
         if self.entity_description.key == "volume_percentage_used":
             return used_gb / total_gb * 100
 
+    # Deprecated since Home Assistant 2024.6.0
+    # Can be removed completely in 2024.12.0
     @property
     def extra_state_attributes(self):
         """Return the state attributes."""
diff --git a/homeassistant/components/qnap/strings.json b/homeassistant/components/qnap/strings.json
index ddceb487e2d7be0afe5dbff08e62f708dd805c67..0d82443da112866ac5b8334e2b1b66576a9ff15d 100644
--- a/homeassistant/components/qnap/strings.json
+++ b/homeassistant/components/qnap/strings.json
@@ -69,6 +69,21 @@
       },
       "volume_percentage_used": {
         "name": "Volume used ({monitor_device})"
+      },
+      "uptime": {
+        "name": "Uptime"
+      },
+      "memory_size": {
+        "name": "Memory size"
+      },
+      "network_err": {
+        "name": "{monitor_device} packet errors"
+      },
+      "network_max_speed": {
+        "name": "{monitor_device} maximum speed"
+      },
+      "volume_size_total": {
+        "name": "Volume size"
       }
     }
   }