diff --git a/DysonNetwork.Drive/Billing/QuotaService.cs b/DysonNetwork.Drive/Billing/QuotaService.cs
index aa91132..a59f294 100644
--- a/DysonNetwork.Drive/Billing/QuotaService.cs
+++ b/DysonNetwork.Drive/Billing/QuotaService.cs
@@ -17,7 +17,7 @@ public class QuotaService(
     {
         // The billable unit is MiB
         var billableUnit = (long)Math.Ceiling(newFileSize / 1024.0 / 1024.0 * costMultiplier);
-        var totalBillableUsage = await usage.GetTotalBillableUsage();
+        var totalBillableUsage = await usage.GetTotalBillableUsage(accountId);
         var quota = await GetQuota(accountId);
         return (totalBillableUsage + billableUnit <= quota, billableUnit, quota);
     }
diff --git a/DysonNetwork.Drive/Billing/UsageService.cs b/DysonNetwork.Drive/Billing/UsageService.cs
index 917c484..ca99273 100644
--- a/DysonNetwork.Drive/Billing/UsageService.cs
+++ b/DysonNetwork.Drive/Billing/UsageService.cs
@@ -60,7 +60,7 @@ public class UsageService(AppDatabase db)
             PoolUsages = poolUsages,
             TotalUsageBytes = totalUsage,
             TotalFileCount = totalFileCount,
-            UsedQuota = await GetTotalBillableUsage()
+            UsedQuota = await GetTotalBillableUsage(accountId)
         };
     }
 
@@ -98,10 +98,11 @@ public class UsageService(AppDatabase db)
         };
     }
 
-    public async Task<long> GetTotalBillableUsage()
+    public async Task<long> GetTotalBillableUsage(Guid accountId)
     {
         var now = SystemClock.Instance.GetCurrentInstant();
         var files = await db.Files
+            .Where(f => f.AccountId == accountId)
             .Where(f => f.PoolId.HasValue)
             .Where(f => !f.IsMarkedRecycle)
             .Include(f => f.Pool)
diff --git a/DysonNetwork.Drive/Storage/TusService.cs b/DysonNetwork.Drive/Storage/TusService.cs
index 60f17a9..a6a0cb4 100644
--- a/DysonNetwork.Drive/Storage/TusService.cs
+++ b/DysonNetwork.Drive/Storage/TusService.cs
@@ -262,7 +262,7 @@ public abstract class TusService
                     {
                         eventContext.FailRequest(
                             HttpStatusCode.Forbidden,
-                            $"File size {billableUnit} MiB is exceed than the user's quota {quota} MiB"
+                            $"File size {billableUnit} MiB is exceeded the user's quota {quota} MiB"
                         );
                         rejected = true;
                     }