diff --git a/DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs b/DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs
index 0335ceb..9f94156 100644
--- a/DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs
+++ b/DiscordChatExporter.Core/Discord/Data/Common/FileSize.cs
@@ -1,6 +1,4 @@
 using System;
-using System.Globalization;
-using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Discord.Data.Common
 {
@@ -12,19 +10,11 @@ namespace DiscordChatExporter.Core.Discord.Data.Common
         public double TotalKiloBytes => TotalBytes / 1024.0;
         public double TotalMegaBytes => TotalKiloBytes / 1024.0;
         public double TotalGigaBytes => TotalMegaBytes / 1024.0;
-        public double TotalTeraBytes => TotalGigaBytes / 1024.0;
-        public double TotalPetaBytes => TotalTeraBytes / 1024.0;
 
         public FileSize(long bytes) => TotalBytes = bytes;
 
         private double GetLargestWholeNumberValue()
         {
-            if (Math.Abs(TotalPetaBytes) >= 1)
-                return TotalPetaBytes;
-
-            if (Math.Abs(TotalTeraBytes) >= 1)
-                return TotalTeraBytes;
-
             if (Math.Abs(TotalGigaBytes) >= 1)
                 return TotalGigaBytes;
 
@@ -39,12 +29,6 @@ namespace DiscordChatExporter.Core.Discord.Data.Common
 
         private string GetLargestWholeNumberSymbol()
         {
-            if (Math.Abs(TotalPetaBytes) >= 1)
-                return "PB";
-
-            if (Math.Abs(TotalTeraBytes) >= 1)
-                return "TB";
-
             if (Math.Abs(TotalGigaBytes) >= 1)
                 return "GB";
 
@@ -63,37 +47,5 @@ namespace DiscordChatExporter.Core.Discord.Data.Common
     public partial struct FileSize
     {
         public static FileSize FromBytes(long bytes) => new(bytes);
-
-        public static FileSize? TryParse(string value)
-        {
-            var match = Regex.Match(value, @"^(\d+[\.,]?\d*)\s*(\w)?b$", RegexOptions.IgnoreCase);
-
-            // Number part
-            if (!double.TryParse(
-                match.Groups[1].Value,
-                NumberStyles.Float,
-                CultureInfo.InvariantCulture,
-                out var number))
-            {
-                return null;
-            }
-
-            // Magnitude part
-            var magnitude = match.Groups[2].Value.ToUpperInvariant() switch
-            {
-                "G" => 1_000_000_000,
-                "M" => 1_000_000,
-                "K" => 1_000,
-                "" => 1,
-                _ => -1
-            };
-
-            if (magnitude < 0)
-            {
-                return null;
-            }
-
-            return FromBytes((long) (number * magnitude));
-        }
     }
 }
\ No newline at end of file
diff --git a/DiscordChatExporter.Core/Exporting/Partitioning/PartitionLimit.cs b/DiscordChatExporter.Core/Exporting/Partitioning/PartitionLimit.cs
index 3b8eceb..1a82259 100644
--- a/DiscordChatExporter.Core/Exporting/Partitioning/PartitionLimit.cs
+++ b/DiscordChatExporter.Core/Exporting/Partitioning/PartitionLimit.cs
@@ -1,4 +1,6 @@
-using DiscordChatExporter.Core.Discord.Data.Common;
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
 
 namespace DiscordChatExporter.Core.Exporting.Partitioning
 {
@@ -9,14 +11,51 @@ namespace DiscordChatExporter.Core.Exporting.Partitioning
 
     public partial class PartitionLimit
     {
-        public static PartitionLimit Parse(string value)
+        private static long? TryParseFileSizeBytes(string value, IFormatProvider? formatProvider = null)
         {
-            var fileSize = FileSize.TryParse(value);
-            if (fileSize is not null)
-                return new FileSizePartitionLimit(fileSize.Value.TotalBytes);
+            var match = Regex.Match(value, @"^\s*(\d+[\.,]?\d*)\s*(\w)?b\s*$", RegexOptions.IgnoreCase);
 
-            var messageCount = int.Parse(value);
-            return new MessageCountPartitionLimit(messageCount);
+            // Number part
+            if (!double.TryParse(
+                match.Groups[1].Value,
+                NumberStyles.Float,
+                formatProvider,
+                out var number))
+            {
+                return null;
+            }
+
+            // Magnitude part
+            var magnitude = match.Groups[2].Value.ToUpperInvariant() switch
+            {
+                "G" => 1_000_000_000,
+                "M" => 1_000_000,
+                "K" => 1_000,
+                "" => 1,
+                _ => -1
+            };
+
+            if (magnitude < 0)
+            {
+                return null;
+            }
+
+            return (long) (number * magnitude);
         }
+
+        public static PartitionLimit? TryParse(string value, IFormatProvider? formatProvider = null)
+        {
+            var fileSizeLimit = TryParseFileSizeBytes(value, formatProvider);
+            if (fileSizeLimit is not null)
+                return new FileSizePartitionLimit(fileSizeLimit.Value);
+
+            if (int.TryParse(value, NumberStyles.Integer, formatProvider, out var messageCountLimit))
+                return new MessageCountPartitionLimit(messageCountLimit);
+
+            return null;
+        }
+
+        public static PartitionLimit Parse(string value, IFormatProvider? formatProvider = null) =>
+            TryParse(value, formatProvider) ?? throw new FormatException($"Invalid partition limit '{value}'.");
     }
 }
\ No newline at end of file