diff --git a/RomRepoMgr.Blazor/Consts.cs b/RomRepoMgr.Blazor/Consts.cs
new file mode 100644
index 0000000..0f12f44
--- /dev/null
+++ b/RomRepoMgr.Blazor/Consts.cs
@@ -0,0 +1,11 @@
+namespace RomRepoMgr.Blazor;
+
+public class Consts
+{
+    public const string DbFolder           = "db";
+    public const string DatFolder          = "dats";
+    public const string IncomingDatFolder  = "incoming-dats";
+    public const string RepositoryFolder   = "repo";
+    public const string IncomingRomsFolder = "incoming";
+    public const string TemporaryFolder    = "tmp";
+}
\ No newline at end of file
diff --git a/RomRepoMgr.Blazor/Program.cs b/RomRepoMgr.Blazor/Program.cs
index cc77f6a..dffc99e 100644
--- a/RomRepoMgr.Blazor/Program.cs
+++ b/RomRepoMgr.Blazor/Program.cs
@@ -1,4 +1,5 @@
 using Microsoft.FluentUI.AspNetCore.Components;
+using RomRepoMgr.Blazor;
 using RomRepoMgr.Blazor.Components;
 using Serilog;
 
@@ -15,8 +16,36 @@ Log.Logger = new LoggerConfiguration()
 Log.Information("Welcome to ROM Repository Manager!");
 Log.Information("Copyright © 2020-2025 Natalia Portillo");
 
+// Ensure the folders exist
+Log.Information("Ensuring folders exist...");
+
+string[] folders =
+[
+    Consts.DbFolder, Consts.DatFolder, Consts.IncomingDatFolder, Consts.RepositoryFolder, Consts.IncomingRomsFolder
+];
+
+foreach(string folder in folders)
+{
+    if(!Directory.Exists(folder))
+    {
+        Log.Debug("Creating folder: {Folder}", folder);
+        Directory.CreateDirectory(folder);
+    }
+    else
+        Log.Debug("Folder already exists: {Folder}", folder);
+}
+
+// Ensure the temporary folder exists but it can also be a symlink
+if(!Directory.Exists(Consts.TemporaryFolder) && !File.Exists(Consts.TemporaryFolder))
+{
+    Log.Debug("Creating folder: {TemporaryFolder}", Consts.TemporaryFolder);
+    Directory.CreateDirectory(Consts.TemporaryFolder);
+}
+else
+    Log.Debug("Folder already exists: {TemporaryFolder}", Consts.TemporaryFolder);
+
 Log.Debug("Creating the builder...");
-var builder = WebApplication.CreateBuilder(args);
+WebApplicationBuilder builder = WebApplication.CreateBuilder(args);
 
 builder.Host.UseSerilog(); // ✅ Plug Serilog into the host
 
@@ -25,12 +54,12 @@ builder.Services.AddRazorComponents().AddInteractiveServerComponents();
 builder.Services.AddFluentUIComponents();
 
 Log.Debug("Building the application...");
-var app = builder.Build();
+WebApplication app = builder.Build();
 
 // Configure the HTTP request pipeline.
 if(!app.Environment.IsDevelopment())
 {
-    app.UseExceptionHandler("/Error", createScopeForErrors: true);
+    app.UseExceptionHandler("/Error", true);
 
     // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
     app.UseHsts();