diff --git a/Helpers/HelperDownload.cs b/Helpers/HelperDownload.cs
new file mode 100644
index 0000000..a4dcc51
--- /dev/null
+++ b/Helpers/HelperDownload.cs
@@ -0,0 +1,65 @@
+using Microsoft.Extensions.Logging;
+using System.Net.Http.Json;
+
+namespace File_Folder_Helper.Helpers;
+
+internal static class HelperDownload
+{
+
+    internal static void SaveJson(ILogger log, string argsZero)
+    {
+        string[] lines;
+        int? jsonBodyLine;
+        string? userAgent;
+        string[] segments;
+        HttpClient httpClient;
+        HttpRequestMessage httpRequestMessage;
+        string[] files = Directory.GetFiles(argsZero, "*.post", SearchOption.TopDirectoryOnly);
+        foreach (string file in files)
+        {
+            jsonBodyLine = null;
+            userAgent = null;
+            lines = File.ReadAllLines(file);
+            if (lines.Length < 2)
+                continue;
+            httpRequestMessage = new(HttpMethod.Post, lines[1]);
+            log.LogInformation("reading {fileName}", Path.GetFileName(file));
+            for (int i = 2; i < lines.Length; i++)
+            {
+                if (lines.Length < 1)
+                    continue;
+                if (lines[i][0] == '#')
+                    continue;
+                else if (lines[i][0] == '{')
+                    jsonBodyLine = i;
+                else
+                {
+                    segments = lines[i].Split(": ");
+                    if (segments.Length < 2)
+                        continue;
+                    if (segments[0] == "User-Agent")
+                        userAgent = segments[1];
+                    else
+                        httpRequestMessage.Headers.Add(segments[0], segments[1]);
+                }
+            }
+            if (jsonBodyLine is not null)
+                httpRequestMessage.Content = JsonContent.Create(lines[jsonBodyLine.Value]);
+            httpClient = new(new HttpClientHandler { UseCookies = false }) { BaseAddress = new Uri(lines[0]) };
+            if (userAgent is not null)
+                httpClient.DefaultRequestHeaders.UserAgent.ParseAdd(userAgent);
+            Task<HttpResponseMessage> httpResponseMessageTask = httpClient.SendAsync(httpRequestMessage);
+            httpResponseMessageTask.Wait();
+            if (!httpResponseMessageTask.Result.IsSuccessStatusCode)
+                throw new Exception(httpResponseMessageTask.Result.StatusCode.ToString());
+            Task<Stream> streamTask = httpResponseMessageTask.Result.Content.ReadAsStreamAsync();
+            streamTask.Wait();
+            if (!streamTask.Result.CanRead)
+                throw new NullReferenceException(nameof(streamTask));
+            using FileStream fileStream = new($"{file}.json", FileMode.CreateNew);
+            Task task = streamTask.Result.CopyToAsync(fileStream);
+            task.Wait();
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/Helpers/HelperFindReplace.cs b/Helpers/HelperFindReplace.cs
new file mode 100644
index 0000000..7d28cfe
--- /dev/null
+++ b/Helpers/HelperFindReplace.cs
@@ -0,0 +1,95 @@
+using Microsoft.Extensions.Logging;
+using System.Collections.ObjectModel;
+
+namespace File_Folder_Helper.Helpers;
+
+internal static class HelperFindReplace
+{
+
+    private static string? GetTnsNamesOraFile(List<string> args)
+    {
+        string? result = null;
+        for (int i = 1; i < args.Count; i++)
+        {
+            if (args[i].Length == 2 && i + 1 < args.Count)
+            {
+                if (args[i][1] == 't')
+                    result = Path.GetFullPath(args[i + 1]);
+                i++;
+            }
+        }
+        return result;
+    }
+
+    private static ReadOnlyCollection<(string, string)> GetFindReplace(string tnsNamesOraFile)
+    {
+        List<(string, string)> results = new();
+        string[] segments;
+        string[] lines = File.ReadAllLines(tnsNamesOraFile);
+        foreach (string line in lines)
+        {
+            segments = line.Split('=');
+            if (segments.Length < 3)
+                continue;
+            results.Add((segments[0].Trim(), line));
+        }
+        return new(results);
+    }
+
+    private static void FindReplace(ILogger log, string[] files, ReadOnlyCollection<(string, string)> findReplace)
+    {
+        bool check;
+        string[] lines;
+        string[] segments;
+        foreach (string file in files)
+        {
+            check = false;
+            lines = File.ReadAllLines(file);
+            for (int i = 0; i < lines.Length; i++)
+            {
+                segments = lines[i].Split('=');
+                if (segments.Length < 3)
+                    continue;
+                foreach ((string find, string replace) in findReplace)
+                {
+                    if (!segments[0].Contains(find))
+                        continue;
+                    if (lines[i] == replace)
+                        continue;
+                    if (!check)
+                        check = true;
+                    lines[i] = replace;
+                }
+            }
+            if (check)
+            {
+                log.LogInformation("{file}", file);
+                File.WriteAllLines(file, lines);
+            }
+        }
+    }
+
+    internal static void UpdateTnsNames(ILogger log, List<string> args)
+    {
+        string? tnsNamesOraFile = GetTnsNamesOraFile(args);
+        ReadOnlyCollection<(string, string)> findReplace;
+        if (!string.IsNullOrEmpty(tnsNamesOraFile) && File.Exists(tnsNamesOraFile))
+            findReplace = GetFindReplace(tnsNamesOraFile);
+        else
+        {
+            log.LogInformation("<{tnsNamesOraFile}> doesn't exist!", tnsNamesOraFile);
+            findReplace = new(Array.Empty<(string, string)>());
+        }
+        if (findReplace.Count == 0)
+            log.LogInformation("Count == {count}", findReplace.Count);
+        else
+        {
+            string[] files = Directory.GetFiles(args[0], "tnsNames.ora", SearchOption.AllDirectories);
+            if (files.Length == 0)
+                log.LogInformation("Count == {count}", findReplace.Count);
+            else
+                FindReplace(log, files, findReplace);
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/Worker.cs b/Worker.cs
index 454e36f..0d98689 100644
--- a/Worker.cs
+++ b/Worker.cs
@@ -40,11 +40,13 @@ public class Worker : BackgroundService
             ConsoleKey.L,
             ConsoleKey.M,
             ConsoleKey.N,
+            ConsoleKey.O,
             ConsoleKey.R,
             ConsoleKey.S,
             ConsoleKey.T,
             ConsoleKey.U,
             ConsoleKey.V,
+            ConsoleKey.X,
             ConsoleKey.Z,
             ConsoleKey.Delete
         };
@@ -102,7 +104,7 @@ public class Worker : BackgroundService
                     _Logger.LogInformation("L) Log Merge (APC Log [0-9(8)]_*.log),");
                     _Logger.LogInformation("N) Create Note Files,");
                     _Logger.LogInformation("M) Markdown Wiki Link Verification,");
-                    // O
+                    _Logger.LogInformation("O) Oracle tnsNames.ora,");
                     // P
                     // Q
                     _Logger.LogInformation("R) Rename to old, copy, delete old,");
@@ -111,7 +113,7 @@ public class Worker : BackgroundService
                     _Logger.LogInformation("U) Links for Hugo,");
                     _Logger.LogInformation("V) VSCode Hope Sort,");
                     // W
-                    // X
+                    _Logger.LogInformation("X) Download,");
                     // Y
                     _Logger.LogInformation("Z) Zip file(s) by date,");
                     _Logger.LogInformation("Delete) Delete empty directories,");
@@ -153,6 +155,9 @@ public class Worker : BackgroundService
                             Helpers.HelperKanbanMetadata.SetMetadata(_Logger, _AppSettings, _Args[0]);
                         Helpers.HelperMarkdown.MarkdownWikiLinkVerification(_AppSettings, _Logger, _Args);
                         break;
+                    case ConsoleKey.O:
+                        Helpers.HelperFindReplace.UpdateTnsNames(_Logger, _Args);
+                        break;
                     case ConsoleKey.R:
                         Helpers.HelperRenameToOldMoveDeleteOldMerge.RenameToOldMoveDeleteOld(_Logger, _Args[0]);
                         break;
@@ -169,6 +174,9 @@ public class Worker : BackgroundService
                     case ConsoleKey.V:
                         Helpers.HelperVSCodePossibleExtension.Sort(_Logger, _Args);
                         break;
+                    case ConsoleKey.X:
+                        Helpers.HelperDownload.SaveJson(_Logger, _Args[0]);
+                        break;
                     case ConsoleKey.Z:
                         _ = Helpers.HelperZipFilesByDate.ZipFilesByDate(_Logger, _Args[0]);
                         break;