diff --git a/src/Diagnostic/FileDiagnosticPopup.tsx b/src/Diagnostic/FileDiagnosticPopup.tsx
new file mode 100644
index 000000000..e83420f90
--- /dev/null
+++ b/src/Diagnostic/FileDiagnosticPopup.tsx
@@ -0,0 +1,68 @@
+import React from "react";
+import { AllServers } from "../Server/AllServers";
+import { Script } from "../Script/Script";
+import { TextFile } from "../TextFile";
+import { Accordion } from "../ui/React/Accordion";
+import { numeralWrapper } from "../ui/numeralFormat";
+
+interface IServerProps {
+    ip: string;
+}
+
+export function ServerAccordion(props: IServerProps): React.ReactElement {
+    const server = AllServers[props.ip];
+    let totalSize = 0;
+    for(const f of server.scripts) {
+        totalSize += f.code.length;
+    }
+
+    for(const f of server.textFiles) {
+        totalSize += f.text.length;
+    }
+
+    if(totalSize === 0) {
+        return <></>
+    }
+
+    interface File {
+        name: string;
+        size: number;
+    }
+
+    const files: File[] = [];
+
+    for(const f of server.scripts) {
+        files.push({name: f.filename, size: f.code.length});
+    }
+
+    for(const f of server.textFiles) {
+        files.push({name: f.fn, size: f.text.length});
+    }
+
+    files.sort((a: File, b: File): number => b.size-a.size);
+
+    return <Accordion
+        headerContent={<>{server.hostname} ({numeralWrapper.formatBigNumber(totalSize)}b)</>}
+        panelContent={<ul>
+            {files.map((file: File) => <li key={file.name}>{file.name}: {numeralWrapper.formatBigNumber(file.size)}b</li>) }
+        </ul>}
+    />
+}
+
+interface IProps {}
+
+export function FileDiagnosticPopup(props: IProps): React.ReactElement {
+    const ips: string[] = [];
+    for(const ip of Object.keys(AllServers)) {
+        ips.push(ip);
+    }
+
+    return (<>
+        <p>
+            Welcome to the file diagnostic! If your save file is really big it's
+            likely because you have too many text/scripts. This tool can help you
+            narrow down where they are.
+        </p>
+        {ips.map((ip: string) => <ServerAccordion key={ip} ip={ip} />)}
+    </>);
+}
\ No newline at end of file
diff --git a/src/engine.jsx b/src/engine.jsx
index 1d000ca04..a29d6fcde 100644
--- a/src/engine.jsx
+++ b/src/engine.jsx
@@ -102,6 +102,9 @@ import { ActiveScriptsRoot } from "./ui/ActiveScripts/Root";
 import { initializeMainMenuHeaders } from "./ui/MainMenu/Headers";
 import { initializeMainMenuLinks, MainMenuLinks } from "./ui/MainMenu/Links";
 
+import { FileDiagnosticPopup } from "./Diagnostic/FileDiagnosticPopup";
+import { createPopup } from "./ui/React/createPopup";
+
 import { dialogBoxCreate } from "../utils/DialogBox";
 import { gameOptionsBoxClose, gameOptionsBoxOpen } from "../utils/GameOptions";
 import { exceptionAlert } from "../utils/helpers/exceptionAlert";
@@ -1523,6 +1526,12 @@ const Engine = {
             gameOptionsBoxClose();
             return false;
         });
+
+        // DEBUG File diagnostic
+        document.getElementById("debug-files").addEventListener("click", function() {
+            createPopup("debug-files-diagnostic-popup", FileDiagnosticPopup, {});
+            return false;
+        });
     },
 
     start: function() {
diff --git a/src/index.html b/src/index.html
index d6ba29f37..ae82924bd 100644
--- a/src/index.html
+++ b/src/index.html
@@ -608,6 +608,14 @@ if (htmlWebpackPlugin.options.googleAnalytics.trackingId) { %>
                         Perform a soft reset. Resets everything as if you had just purchased an Augmentation.
                     </span>
                 </button>
+                <button id="debug-files" class="a-link-button tooltip">
+                    Diagnose files
+                    <span class="tooltiptextleft">
+                        If your save file is extremely big you can use this button
+                        to view a map of all the files on every server. Be careful
+                        there might be spoilers.
+                    </span>
+                </button>
             </div>
         </div>
     </div>