diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index f9f4cdf..e97f020 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -63,7 +63,6 @@
 import android.os.Binder;
 import android.os.Build;
 import android.os.Bundle;
-import android.os.Environment;
 import android.os.IBinder;
 import android.os.INetworkManagementService;
 import android.os.RemoteException;
@@ -1296,14 +1295,4 @@
         return dreamsSupported && (!dreamsOnlyEnabledForDockUser || canCurrentUserDream(context));
     }
 
-    /**
-     * Get private total size directly.
-     * Referred from StorageManager
-     */
-    public static long getPrimaryStorageSize() {
-        // TODO(b/288103116): remove this method once support by StorageManager.
-        return Environment.getDataDirectory().getTotalSpace()
-                + Environment.getRootDirectory().getTotalSpace();
-    }
-
 }
diff --git a/src/com/android/settings/deviceinfo/StorageCategoryFragment.java b/src/com/android/settings/deviceinfo/StorageCategoryFragment.java
index d1d4cbe..52f453d 100644
--- a/src/com/android/settings/deviceinfo/StorageCategoryFragment.java
+++ b/src/com/android/settings/deviceinfo/StorageCategoryFragment.java
@@ -211,9 +211,7 @@
 
         setLoading(false /* loading */, false /* animate */);
 
-        // TODO(b/288103116): replace with  new API to get TotalBytes before rounding
-        //  once support by StorageManager.
-        final long privateUsedBytes = Utils.getPrimaryStorageSize() - mStorageInfo.freeBytes;
+        final long privateUsedBytes = mStorageInfo.totalBytes - mStorageInfo.freeBytes;
         mPreferenceController.setVolume(mSelectedStorageEntry.getVolumeInfo());
         mPreferenceController.setUsedSize(privateUsedBytes);
         mPreferenceController.setTotalSize(mStorageInfo.totalBytes);
diff --git a/src/com/android/settings/deviceinfo/StorageDashboardFragment.java b/src/com/android/settings/deviceinfo/StorageDashboardFragment.java
index 4138057..f31f2be 100644
--- a/src/com/android/settings/deviceinfo/StorageDashboardFragment.java
+++ b/src/com/android/settings/deviceinfo/StorageDashboardFragment.java
@@ -387,9 +387,7 @@
 
         setLoading(false /* loading */, false /* animate */);
 
-        // TODO(b/288103116): replace with  new API to get TotalBytes before rounding
-        //  once support by StorageManager.
-        final long privateUsedBytes = Utils.getPrimaryStorageSize() - mStorageInfo.freeBytes;
+        final long privateUsedBytes = mStorageInfo.totalBytes - mStorageInfo.freeBytes;
         mPreferenceController.setVolume(mSelectedStorageEntry.getVolumeInfo());
         mPreferenceController.setUsedSize(privateUsedBytes);
         mPreferenceController.setTotalSize(mStorageInfo.totalBytes);
diff --git a/src/com/android/settings/deviceinfo/TopLevelStoragePreferenceController.java b/src/com/android/settings/deviceinfo/TopLevelStoragePreferenceController.java
index 43dc9dd..ccae7e9 100644
--- a/src/com/android/settings/deviceinfo/TopLevelStoragePreferenceController.java
+++ b/src/com/android/settings/deviceinfo/TopLevelStoragePreferenceController.java
@@ -75,9 +75,7 @@
             final PrivateStorageInfo info = PrivateStorageInfo.getPrivateStorageInfo(
                     getStorageManagerVolumeProvider());
 
-            // TODO(b/288103116): replace with  new API to get TotalBytes before rounding
-            //  once support by StorageManager.
-            long usedBytes = Utils.getPrimaryStorageSize() - info.freeBytes;
+            long usedBytes = info.totalBytes - info.freeBytes;
             storageCacheHelper.cacheUsedSize(usedBytes);
             ThreadUtils.postOnMainThread(() -> {
                 preference.setSummary(
diff --git a/src/com/android/settings/deviceinfo/storage/StorageUsageProgressBarPreferenceController.java b/src/com/android/settings/deviceinfo/storage/StorageUsageProgressBarPreferenceController.java
index 23559d4..be2a64a 100644
--- a/src/com/android/settings/deviceinfo/storage/StorageUsageProgressBarPreferenceController.java
+++ b/src/com/android/settings/deviceinfo/storage/StorageUsageProgressBarPreferenceController.java
@@ -26,7 +26,6 @@
 import androidx.preference.PreferenceScreen;
 
 import com.android.settings.R;
-import com.android.settings.Utils;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settingslib.utils.ThreadUtils;
 import com.android.settingslib.widget.UsageProgressBarPreference;
@@ -93,9 +92,7 @@
                 if (mStorageEntry.isPrivate()) {
                     // StorageStatsManager can only query private storages.
                     mTotalBytes = mStorageStatsManager.getTotalBytes(mStorageEntry.getFsUuid());
-                    // TODO(b/288103116): replace with  new API to get TotalBytes before rounding
-                    //  once support by StorageManager.
-                    mUsedBytes = Utils.getPrimaryStorageSize()
+                    mUsedBytes = mTotalBytes
                             - mStorageStatsManager.getFreeBytes(mStorageEntry.getFsUuid());
                 } else {
                     final File rootFile = mStorageEntry.getPath();