diff --git a/Wabbajack.Common/IEnumerableExtensions.cs b/Wabbajack.Common/IEnumerableExtensions.cs
index ee8141fa..3958df0d 100644
--- a/Wabbajack.Common/IEnumerableExtensions.cs
+++ b/Wabbajack.Common/IEnumerableExtensions.cs
@@ -58,7 +58,14 @@ public static class IEnumerableExtensions
         return data;
     }
 
-    public static IEnumerable<IEnumerable<T>> Partition<T>(this IEnumerable<T> coll, int size)
+    /// <summary>
+    /// Splits the collection into `size` parts
+    /// </summary>
+    /// <param name="coll"></param>
+    /// <param name="count"></param>
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    public static IEnumerable<IEnumerable<T>> Partition<T>(this IEnumerable<T> coll, int count)
     {
         var asList = coll.ToList();
 
@@ -70,7 +77,30 @@ public static class IEnumerableExtensions
             }
         }
 
-        return Enumerable.Range(0, size).Select(offset => SkipEnumerable(asList, offset, size));
+        return Enumerable.Range(0, count).Select(offset => SkipEnumerable(asList, offset, count));
+    }
+
+    /// <summary>
+    /// Split the collection into `size` parts
+    /// </summary>
+    /// <param name="coll"></param>
+    /// <param name="size"></param>
+    /// <typeparam name="T"></typeparam>
+    /// <returns></returns>
+    public static IEnumerable<IEnumerable<T>> Batch<T>(this IEnumerable<T> coll, int size)
+    {
+        List<T> current = new();
+        foreach (var itm in coll)
+        {
+            current.Add(itm);
+            if (current.Count == size)
+            {
+                yield return current;
+                current = new List<T>();
+            }
+        }
+        if (current.Count > 0)
+            yield return current;
     }
 
 
diff --git a/Wabbajack.Networking.WabbajackClientApi/Client.cs b/Wabbajack.Networking.WabbajackClientApi/Client.cs
index d32d7d9f..6fe37c3c 100644
--- a/Wabbajack.Networking.WabbajackClientApi/Client.cs
+++ b/Wabbajack.Networking.WabbajackClientApi/Client.cs
@@ -93,7 +93,7 @@ public class Client
         {
             _logger.LogError("HTTP Error: {Result}", result);
             await SendMetric("rebound", "Error", false);
-            Environment.Exit(0);
+           // Environment.Exit(0);
         }
     }
 
diff --git a/Wabbajack.Server/AppSettings.cs b/Wabbajack.Server/AppSettings.cs
index 5c51ebeb..6b16a846 100644
--- a/Wabbajack.Server/AppSettings.cs
+++ b/Wabbajack.Server/AppSettings.cs
@@ -1,4 +1,5 @@
-using Microsoft.Extensions.Configuration;
+using Amazon.S3;
+using Microsoft.Extensions.Configuration;
 using Wabbajack.Paths;
 
 namespace Wabbajack.BuildServer;
@@ -26,8 +27,6 @@ public class AppSettings
 
     public string DiscordKey { get; set; }
     
-    public string AuthoredFilesFolder { get; set; }
-    
     public string PatchesFilesFolder { get; set; }
     public string MirrorFilesFolder { get; set; }
     public string NexusCacheFolder { get; set; }
@@ -37,6 +36,19 @@ public class AppSettings
     
     public CouchDBSetting CesiDB { get; set; }
     public CouchDBSetting MetricsDB { get; set; }
+
+    public S3Settings AuthoredFilesS3 { get; set; }
+}
+
+public class S3Settings
+{
+    public string AccessKey { get; set; }
+    public string SecretKey { get; set; }
+    public string ServiceURL { get; set; }
+    
+    public string BucketName { get; set; }
+    
+    public string BucketCacheFile { get; set; }
 }
 
 public class CouchDBSetting
diff --git a/Wabbajack.Server/Controllers/AuthorControls.cs b/Wabbajack.Server/Controllers/AuthorControls.cs
index 0608c9c6..71cb8c64 100644
--- a/Wabbajack.Server/Controllers/AuthorControls.cs
+++ b/Wabbajack.Server/Controllers/AuthorControls.cs
@@ -147,7 +147,7 @@ public class AuthorControls : ControllerBase
     public async Task<IActionResult> HomePage()
     {
         var user = User.FindFirstValue(ClaimTypes.Name);
-        var files = (await _authorFiles.AllAuthoredFiles())
+        var files = _authorFiles.AllDefinitions
             .Where(af => af.Definition.Author == user)
             .Select(af => new
             {
diff --git a/Wabbajack.Server/Controllers/AuthoredFiles.cs b/Wabbajack.Server/Controllers/AuthoredFiles.cs
index 6abd80ed..107b7956 100644
--- a/Wabbajack.Server/Controllers/AuthoredFiles.cs
+++ b/Wabbajack.Server/Controllers/AuthoredFiles.cs
@@ -68,8 +68,7 @@ public class AuthoredFiles : ControllerBase
                 $"Hashes don't match for index {index}. Sizes ({ms.Length} vs {part.Size}). Hashes ({hash} vs {part.Hash}");
 
         ms.Position = 0;
-        await using var partStream = await _authoredFiles.CreatePart(definition.MungedName, (int)index);
-        await ms.CopyToAsync(partStream, token);
+        await _authoredFiles.WritePart(definition.MungedName, (int) index, ms);
         return Ok(part.Hash.ToBase64());
     }
 
@@ -123,7 +122,7 @@ public class AuthoredFiles : ControllerBase
     public async Task<IActionResult> DeleteUpload(string serverAssignedUniqueId)
     {
         var user = User.FindFirstValue(ClaimTypes.Name);
-        var definition = (await _authoredFiles.AllAuthoredFiles())
+        var definition = _authoredFiles.AllDefinitions
             .First(f => f.Definition.ServerAssignedUniqueId == serverAssignedUniqueId)
             .Definition;
         if (definition.Author != user)
@@ -145,12 +144,12 @@ public class AuthoredFiles : ControllerBase
     [Route("")]
     public async Task<ContentResult> UploadedFilesGet()
     {
-        var files = await _authoredFiles.AllAuthoredFiles();
+        var files = _authoredFiles.AllDefinitions
+            .ToArray();
         var response = _authoredFilesTemplate(new
         {
             Files = files.OrderByDescending(f => f.Updated).ToArray(),
-            TotalSpace = _authoredFiles.TotalSpace.Bytes().Humanize("#.##"),
-            FreeSpace = _authoredFiles.FreeSpace.Bytes().Humanize("#.##")
+            UsedSpace = _authoredFiles.UsedSpace.Bytes().Humanize("#.##"),
         });
         return new ContentResult
         {
@@ -172,10 +171,13 @@ public class AuthoredFiles : ControllerBase
         Response.Headers.ContentType = new StringValues("application/octet-stream");
         Response.Headers.ContentLength = definition.Size;
         Response.Headers.ETag = definition.MungedName + "_direct";
-        foreach (var part in definition.Parts)
+
+        foreach (var part in definition.Parts.OrderBy(p => p.Index))
         {
-            await using var partStream = await _authoredFiles.StreamForPart(mungedName, (int)part.Index);
-            await partStream.CopyToAsync(Response.Body);
+            await _authoredFiles.StreamForPart(mungedName, (int)part.Index, async stream =>
+            {
+                await stream.CopyToAsync(Response.Body);
+            });
         }
     }
 }
\ No newline at end of file
diff --git a/Wabbajack.Server/DataModels/AuthorFiles.cs b/Wabbajack.Server/DataModels/AuthorFiles.cs
index 5f76efb9..74726b9f 100644
--- a/Wabbajack.Server/DataModels/AuthorFiles.cs
+++ b/Wabbajack.Server/DataModels/AuthorFiles.cs
@@ -1,6 +1,11 @@
+using System.Collections.Concurrent;
+using System.Diagnostics;
 using System.IO.Compression;
 using System.Web;
+using Amazon.S3;
+using Amazon.S3.Model;
 using Microsoft.Extensions.Logging;
+using Microsoft.IO;
 using Wabbajack.BuildServer;
 using Wabbajack.Common;
 using Wabbajack.DTOs.CDN;
@@ -16,88 +21,207 @@ public class AuthorFiles
     private readonly ILogger<AuthorFiles> _logger;
     private readonly AppSettings _settings;
     private readonly DTOSerializer _dtos;
-    private Dictionary<string, FileDefinition> _byServerId = new();
+    private ConcurrentDictionary<string, FileDefinition> _byServerId = new();
+    private readonly IAmazonS3 _s3;
+    private readonly ConcurrentDictionary<string,FileDefinitionMetadata> _fileCache;
+    private readonly string _bucketName;
+    private ConcurrentDictionary<RelativePath, long> _allObjects = new();
+    private HashSet<RelativePath> _mangledNames;
+    private readonly RecyclableMemoryStreamManager _streamPool;
+    private readonly HttpClient _httpClient;
 
-    public AbsolutePath AuthorFilesLocation => _settings.AuthoredFilesFolder.ToAbsolutePath();
-
-    public AuthorFiles(ILogger<AuthorFiles> logger, AppSettings settings, DTOSerializer dtos)
+    private Uri _baseUri => new($"https://r2.wabbajack.org/");
+    
+    public AuthorFiles(ILogger<AuthorFiles> logger, AppSettings settings, DTOSerializer dtos, IAmazonS3 s3, HttpClient client)
     {
+        _httpClient = client;
+        _s3 = s3;
         _logger = logger;
         _settings = settings;
         _dtos = dtos;
+        _fileCache = new ConcurrentDictionary<string, FileDefinitionMetadata>();
+        _bucketName = settings.AuthoredFilesS3.BucketName;
+        _ = PrimeCache();
+        _streamPool = new RecyclableMemoryStreamManager();
     }
 
-    public IEnumerable<AbsolutePath> AllDefinitions => AuthorFilesLocation.EnumerateFiles("definition.json.gz");
-    
-    /// <summary>
-    /// Total unused space available for authored files
-    /// </summary>
-    public long FreeSpace => new DriveInfo(AuthorFilesLocation.ToString()).AvailableFreeSpace;
-    
-    /// <summary>
-    /// Total space available for authored files
-    /// </summary>
-    public long TotalSpace => new DriveInfo(AuthorFilesLocation.ToString()).TotalSize;
-    
-    /// <summary>
-    /// 
-    /// </summary>
-    /// <returns></returns>
-
-    public async Task<FileDefinitionMetadata[]> AllAuthoredFiles()
+    private async Task PrimeCache()
     {
-        var defs = new List<FileDefinitionMetadata>();
-        foreach (var file in AllDefinitions)
+        try
         {
-            defs.Add(new FileDefinitionMetadata
+            var cacheFile = _settings.AuthoredFilesS3.BucketCacheFile.ToAbsolutePath();
+            if (!cacheFile.FileExists())
             {
-                Definition = await ReadDefinition(file),
-                Updated = file.LastModifiedUtc()
+                var allObjects = await AllObjects().ToArrayAsync();
+                foreach (var obje in allObjects)
+                {
+                    _allObjects.TryAdd(obje.Key.ToRelativePath(), obje.LastModified.ToFileTimeUtc());
+                }
+                SaveBucketCacheFile(cacheFile);
+            }
+            else
+            {
+                LoadBucketCacheFile(cacheFile);
+            }
+
+
+            _mangledNames = _allObjects
+                .Where(f => f.Key.EndsWith("definition.json.gz"))
+                .Select(f => f.Key.Parent)
+                .ToHashSet();
+
+            await Parallel.ForEachAsync(_mangledNames, async (name, _) =>
+            {
+                if (!_allObjects.TryGetValue(name.Combine("definition.json.gz"), out var value))
+                    return;
+
+                _logger.LogInformation("Priming {Name}", name);
+                var definition = await PrimeDefinition(name);
+                var metadata = new FileDefinitionMetadata()
+                {
+                    Definition = definition,
+                    Updated = DateTime.FromFileTimeUtc(value)
+                };
+                _fileCache.TryAdd(definition.MungedName, metadata);
+                _byServerId.TryAdd(definition.ServerAssignedUniqueId!, definition);
             });
+            
+            _logger.LogInformation("Finished priming cache, {Count} files {Size} GB cached", _fileCache.Count, 
+                _fileCache.Sum(s => s.Value.Definition.Size) / (1024 * 1024 * 1024));
+
+        }
+        catch (Exception ex)
+        {
+            _logger.LogCritical(ex, "Failed to prime cache");
+        }
+    }
+
+    private void SaveBucketCacheFile(AbsolutePath cacheFile)
+    {
+        using var file = cacheFile.Open(FileMode.Create, FileAccess.Write);
+        using var sw = new StreamWriter(file);
+        foreach(var entry in _allObjects)
+        {
+            sw.WriteLine($"{entry.Key}||{entry.Value}");
+        }
+    }
+    
+    private void LoadBucketCacheFile(AbsolutePath cacheFile)
+    {
+        using var file = cacheFile.Open(FileMode.Open, FileAccess.Read);
+        using var sr = new StreamReader(file);
+        while (!sr.EndOfStream)
+        {
+            var line = sr.ReadLine();
+            var parts = line!.Split("||");
+            _allObjects.TryAdd(parts[0].ToRelativePath(), long.Parse(parts[1]));
+        }
+    }
+
+    private async Task<FileDefinition> PrimeDefinition(RelativePath name)
+    {
+        var uri = _baseUri + $"{name}/definition.json.gz";
+        using var response = await _httpClient.GetAsync(uri);
+        return await ReadDefinition(await response.Content.ReadAsStreamAsync());
+    }
+
+    private async IAsyncEnumerable<S3Object> AllObjects()
+    {
+        var sw = Stopwatch.StartNew();
+        var total = 0;
+        _logger.Log(LogLevel.Information, "Listing all objects in S3");
+        var results = await _s3.ListObjectsV2Async(new ListObjectsV2Request()
+        {
+            BucketName = _bucketName,
+        });
+        TOP:
+        total += results.S3Objects.Count;
+        _logger.Log(LogLevel.Information, "Got {S3ObjectsCount} objects, {Total} total", results.S3Objects.Count, total);
+        foreach (var result in results.S3Objects)
+        {
+            yield return result;
         }
 
-        _byServerId = defs.ToDictionary(f => f.Definition.ServerAssignedUniqueId!, f => f.Definition);
-        return defs.ToArray();
+        if (results.IsTruncated)
+        {
+            results = await _s3.ListObjectsV2Async(new ListObjectsV2Request
+            {
+                ContinuationToken = results.NextContinuationToken,
+                BucketName = _bucketName,
+            });
+            goto TOP;
+        }
+        _logger.LogInformation("Finished listing all objects in S3 in {Elapsed}", sw.Elapsed);
     }
 
-    public async Task<Stream> StreamForPart(string mungedName, int part)
+    public IEnumerable<FileDefinitionMetadata> AllDefinitions => _fileCache.Values;
+    
+    /// <summary>
+    /// Used space in bytes
+    /// </summary>
+    public long UsedSpace => _fileCache.Sum(s => s.Value.Definition.Size);
+    
+    public async Task StreamForPart(string mungedName, int part, Func<Stream, Task> func)
     {
-        return AuthorFilesLocation.Combine(mungedName, "parts", part.ToString()).Open(FileMode.Open);
+        var definition = _fileCache[mungedName].Definition;
+        
+        if (part >= definition.Parts.Length)
+            throw new ArgumentOutOfRangeException(nameof(part));
+        
+        var uri = _baseUri + $"{mungedName}/parts/{part}";
+        using var response = await _httpClient.GetAsync(uri);
+        await func(await response.Content.ReadAsStreamAsync());
     }
     
-    public async Task<Stream> CreatePart(string mungedName, int part)
+    public async Task WritePart(string mungedName, int part, Stream ms)
     {
-        return AuthorFilesLocation.Combine(mungedName, "parts", part.ToString()).Open(FileMode.Create, FileAccess.Write, FileShare.None);
+        await _s3.PutObjectAsync(new PutObjectRequest
+        {
+            BucketName = _bucketName,
+            Key = mungedName.ToRelativePath().Combine("parts", part.ToString()).ToString().Replace("\\", "/"),
+            InputStream = ms,
+            DisablePayloadSigning = true
+        });
     }
 
     public async Task WriteDefinition(FileDefinition definition)
     {
-        var path = AuthorFilesLocation.Combine(definition.MungedName, "definition.json.gz");
-        path.Parent.CreateDirectory();
-        path.Parent.Combine("parts").CreateDirectory();
-        
         await using var ms = new MemoryStream();
         await using (var gz = new GZipStream(ms, CompressionLevel.Optimal, true))
         {
             await _dtos.Serialize(definition, gz);
         }
-
-        await path.WriteAllBytesAsync(ms.ToArray());
+        ms.Position = 0;
+        
+        await _s3.PutObjectAsync(new PutObjectRequest
+        {
+            BucketName = _bucketName,
+            Key = definition.MungedName.ToRelativePath().Combine("definition.json.gz").ToString().Replace("\\", "/"),
+            InputStream = ms,
+            DisablePayloadSigning = true
+        });
+        _fileCache.TryAdd(definition.MungedName, new FileDefinitionMetadata
+        {
+            Definition = definition,
+            Updated = DateTime.UtcNow
+        });
+        _byServerId.TryAdd(definition.ServerAssignedUniqueId!, definition);
     }
 
     public async Task<FileDefinition> ReadDefinition(string mungedName)
     {
-        return await ReadDefinition(AuthorFilesLocation.Combine(mungedName, "definition.json.gz"));
+        return _fileCache[mungedName].Definition;
     }
     
     public bool IsDefinition(string mungedName)
     {
-        return AuthorFilesLocation.Combine(mungedName, "definition.json.gz").FileExists();
+        return _fileCache.ContainsKey(mungedName);
     }
     
-    private async Task<FileDefinition> ReadDefinition(AbsolutePath file)
+    
+    private async Task<FileDefinition> ReadDefinition(Stream stream)
     {
-        var gz = new GZipStream(new MemoryStream(await file.ReadAllBytesAsync()), CompressionMode.Decompress);
+        var gz = new GZipStream(stream, CompressionMode.Decompress);
         var definition = (await _dtos.DeserializeAsync<FileDefinition>(gz))!;
         return definition;
     }
@@ -111,15 +235,33 @@ public class AuthorFiles
 
     public async Task DeleteFile(FileDefinition definition)
     {
-        var folder = AuthorFilesLocation.Combine(definition.MungedName);
-        folder.DeleteDirectory();
+        var allFiles = _allObjects.Where(f => f.Key.TopParent.ToString() == definition.MungedName)
+            .Select(f => f.Key).ToList();
+        foreach (var batch in allFiles.Batch(512))
+        {
+            var batchedArray = batch.ToHashSet();
+            _logger.LogInformation("Deleting {Count} files for prefix {Prefix}", batchedArray.Count, definition.MungedName);
+            await _s3.DeleteObjectsAsync(new DeleteObjectsRequest
+            {
+                BucketName = _bucketName,
+                
+                Objects = batchedArray.Select(f => new KeyVersion
+                {
+                    Key = f.ToString().Replace("\\", "/")
+                }).ToList()
+            });
+            foreach (var key in batchedArray)
+            {
+                _allObjects.TryRemove(key, out _);
+            }
+        }
+
+        _byServerId.TryRemove(definition.ServerAssignedUniqueId!, out _);
+        _fileCache.TryRemove(definition.MungedName, out _);
     }
 
-    public async Task<FileDefinition> ReadDefinitionForServerId(string serverAssignedUniqueId)
+    public async ValueTask<FileDefinition> ReadDefinitionForServerId(string serverAssignedUniqueId)
     {
-        if (_byServerId.TryGetValue(serverAssignedUniqueId, out var found))
-            return found;
-        await AllAuthoredFiles();
         return _byServerId[serverAssignedUniqueId];
     }
 
diff --git a/Wabbajack.Server/Resources/Reports/AuthoredFiles.html b/Wabbajack.Server/Resources/Reports/AuthoredFiles.html
index 42a4ed20..fe85202d 100644
--- a/Wabbajack.Server/Resources/Reports/AuthoredFiles.html
+++ b/Wabbajack.Server/Resources/Reports/AuthoredFiles.html
@@ -11,7 +11,7 @@
 </head>
 <body>
 <H1>Authored Files:</H1>
-<H3>{{$.FreeSpace}} remaining of {{$.TotalSpace}} </H3>
+<H3>{{$.UsedSpace}}</H3>
 <table id="inlined-data" class="table table-striped table-bordered" style="width:100%" >
     <thead>
     <tr>
diff --git a/Wabbajack.Server/Startup.cs b/Wabbajack.Server/Startup.cs
index 30ba2c14..57923c89 100644
--- a/Wabbajack.Server/Startup.cs
+++ b/Wabbajack.Server/Startup.cs
@@ -5,6 +5,8 @@ using System.Runtime.InteropServices;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using System.Threading.Tasks;
+using Amazon.Runtime;
+using Amazon.S3;
 using cesi.DTOs;
 using CouchDB.Driver;
 using CouchDB.Driver.Options;
@@ -39,10 +41,10 @@ using Wabbajack.Server.Services;
 using Wabbajack.Services.OSIntegrated.TokenProviders;
 using Wabbajack.Networking.WabbajackClientApi;
 using Wabbajack.Paths.IO;
-using Wabbajack.Server.DTOs;
 using Wabbajack.VFS;
 using YamlDotNet.Serialization.NamingConventions;
 using Client = Wabbajack.Networking.GitHub.Client;
+using Metric = Wabbajack.Server.DTOs.Metric;
 
 namespace Wabbajack.Server;
 
@@ -93,6 +95,16 @@ public class Startup
         services.AddSingleton<TarLog>();
         services.AddAllSingleton<IHttpDownloader, SingleThreadedDownloader>();
         services.AddDownloadDispatcher(useLoginDownloaders:false, useProxyCache:false);
+        services.AddSingleton<IAmazonS3>(s =>
+        {
+            var appSettings = s.GetRequiredService<AppSettings>();
+            var settings = new BasicAWSCredentials(appSettings.AuthoredFilesS3.AccessKey,
+                appSettings.AuthoredFilesS3.SecretKey);
+            return new AmazonS3Client(settings, new AmazonS3Config
+            {
+                ServiceURL = appSettings.AuthoredFilesS3.ServiceURL,
+            });
+        });
         services.AddTransient(s =>
         {
             var settings = s.GetRequiredService<AppSettings>();
@@ -243,5 +255,7 @@ public class Startup
         // Trigger the internal update code
         app.ApplicationServices.GetRequiredService<NexusCacheManager>();
         app.ApplicationServices.GetRequiredService<DiscordBackend>();
+
+        app.ApplicationServices.GetRequiredService<AuthorFiles>();
     }
 }
\ No newline at end of file
diff --git a/Wabbajack.Server/Wabbajack.Server.csproj b/Wabbajack.Server/Wabbajack.Server.csproj
index 9abb308e..61f73c13 100644
--- a/Wabbajack.Server/Wabbajack.Server.csproj
+++ b/Wabbajack.Server/Wabbajack.Server.csproj
@@ -12,6 +12,7 @@
     </PropertyGroup>
     
     <ItemGroup>
+        <PackageReference Include="AWSSDK.S3" Version="3.7.205.9" />
         <PackageReference Include="cesi.DTOs" Version="1.0.0" />
         <PackageReference Include="Chronic.Core" Version="0.4.0" />
         <PackageReference Include="Dapper" Version="2.0.123" />
@@ -22,6 +23,7 @@
         <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="6.0.11" />
         <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="2.2.0" />
         <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="6.0.3" />
+        <PackageReference Include="Microsoft.IO.RecyclableMemoryStream" Version="2.3.2" />
         <PackageReference Include="Nettle" Version="1.3.0" />
         <PackageReference Include="System.Data.SqlClient" Version="4.8.5" />
     </ItemGroup>