diff --git a/src/common/exists.ts b/src/common/exists.ts
new file mode 100644
index 000000000..cecdd9f4f
--- /dev/null
+++ b/src/common/exists.ts
@@ -0,0 +1,7 @@
+// Based on https://github.com/wilsonzlin/edgesearch/blob/d03816dd4b18d3d2eb6d08cb1ae14f96f046141d/demo/wiki/client/src/util/util.ts
+
+// Ensures value is not null or undefined.
+// != does no type validation so we don't need to explcitly check for undefined.
+export function exists<T>(value: T | null | undefined): value is T {
+  return value != null;
+}
diff --git a/src/renderer/containers/ReplayBrowser/ReplayBrowser.tsx b/src/renderer/containers/ReplayBrowser/ReplayBrowser.tsx
index 9d894a840..f7aab8779 100644
--- a/src/renderer/containers/ReplayBrowser/ReplayBrowser.tsx
+++ b/src/renderer/containers/ReplayBrowser/ReplayBrowser.tsx
@@ -9,6 +9,7 @@ import Typography from "@material-ui/core/Typography";
 import FolderIcon from "@material-ui/icons/Folder";
 import SearchIcon from "@material-ui/icons/Search";
 import { colors } from "common/colors";
+import { exists } from "common/exists";
 import { shell } from "electron";
 import React from "react";
 import { useToasts } from "react-toast-notifications";
@@ -22,6 +23,7 @@ import { useDolphin } from "@/lib/hooks/useDolphin";
 import { useReplayBrowserList, useReplayBrowserNavigation } from "@/lib/hooks/useReplayBrowserList";
 import { useReplayFilter } from "@/lib/hooks/useReplayFilter";
 import { useReplays, useReplaySelection } from "@/lib/hooks/useReplays";
+import { humanReadableBytes } from "@/lib/utils";
 
 import { FileList } from "./FileList";
 import { FileSelectionToolbar } from "./FileSelectionToolbar";
@@ -41,6 +43,7 @@ export const ReplayBrowser: React.FC = () => {
   const netplaySlpFolder = useReplays((store) => store.netplaySlpFolder);
   const extraFolders = useReplays((store) => store.extraFolders);
   const selectedFiles = useReplays((store) => store.selectedFiles);
+  const totalBytes = useReplays((store) => store.totalBytes);
   const fileSelection = useReplaySelection();
   const fileErrorCount = useReplays((store) => store.fileErrorCount);
   const { addToast } = useToasts();
@@ -202,7 +205,8 @@ export const ReplayBrowser: React.FC = () => {
         </div>
         <div style={{ textAlign: "right" }}>
           {filteredFiles.length} files found. {hiddenFileCount} files filtered.{" "}
-          {fileErrorCount > 0 ? `${fileErrorCount} files had errors.` : ""}
+          {fileErrorCount > 0 ? `${fileErrorCount} files had errors. ` : ""}
+          {exists(totalBytes) ? `Total size: ${humanReadableBytes(totalBytes)}` : ""}
         </div>
       </Footer>
     </Outer>
diff --git a/src/renderer/lib/hooks/useReplays.ts b/src/renderer/lib/hooks/useReplays.ts
index fd9c82320..76ad6455e 100644
--- a/src/renderer/lib/hooks/useReplays.ts
+++ b/src/renderer/lib/hooks/useReplays.ts
@@ -15,6 +15,7 @@ type StoreState = {
   progress: Progress | null;
   files: FileResult[];
   netplaySlpFolder: FolderResult | null;
+  totalBytes: number | null;
   extraFolders: FolderResult[];
   currentRoot: string | null;
   currentFolder: string;
@@ -45,6 +46,7 @@ const initialState: StoreState = {
   loading: false,
   progress: null,
   files: [],
+  totalBytes: null,
   netplaySlpFolder: null,
   extraFolders: [],
   currentRoot: null,
@@ -145,6 +147,7 @@ export const useReplays = create<StoreState & StoreReducers>((set, get) => ({
         files: result.files,
         loading: false,
         fileErrorCount: result.fileErrorCount,
+        totalBytes: result.totalBytes,
       });
     } catch (err) {
       set({ loading: false, progress: null });
diff --git a/src/renderer/lib/utils.ts b/src/renderer/lib/utils.ts
index e42d68048..dc1032489 100644
--- a/src/renderer/lib/utils.ts
+++ b/src/renderer/lib/utils.ts
@@ -44,3 +44,16 @@ export const toOrdinal = (i: number): string => {
   }
   return i + "th";
 };
+
+// Converts number of bytes into a human readable format.
+// Based on code available from:
+// https://coderrocketfuel.com/article/get-the-total-size-of-all-files-in-a-directory-using-node-js
+export const humanReadableBytes = (bytes: number): string => {
+  const sizes = ["bytes", "KB", "MB", "GB", "TB"];
+  if (bytes > 0) {
+    const i = Math.floor(Math.log(bytes) / Math.log(1024));
+    return `${(bytes / Math.pow(1024, i)).toFixed(1)} ${sizes[i]}`;
+  }
+
+  return `0 ${sizes[0]}`;
+};
diff --git a/src/replays/loadFolder.ts b/src/replays/loadFolder.ts
index d12c7c0f2..fa4f9e0e0 100644
--- a/src/replays/loadFolder.ts
+++ b/src/replays/loadFolder.ts
@@ -1,3 +1,4 @@
+import { exists } from "common/exists";
 import * as fs from "fs-extra";
 import path from "path";
 
@@ -13,14 +14,16 @@ export async function loadFolder(
     return {
       files: [],
       fileErrorCount: 0,
+      totalBytes: 0,
     };
   }
 
   const results = await fs.readdir(folder, { withFileTypes: true });
-  const slpFiles = results.filter((dirent) => dirent.isFile() && path.extname(dirent.name) === ".slp");
-  const total = slpFiles.length;
+  const fullSlpPaths = results
+    .filter((dirent) => dirent.isFile() && path.extname(dirent.name) === ".slp")
+    .map((dirent) => path.resolve(folder, dirent.name));
+  const total = fullSlpPaths.length;
 
-  let fileErrorCount = 0;
   let fileValidCount = 0;
   callback(0, total);
 
@@ -33,27 +36,34 @@ export async function loadFolder(
           callback(fileValidCount, total);
           resolve(res);
         } catch (err) {
-          fileErrorCount += 1;
           resolve(null);
         }
       });
     });
   };
 
-  const slpGames = (
-    await Promise.all(
-      slpFiles.map((dirent) => {
-        const fullPath = path.resolve(folder, dirent.name);
-        return process(fullPath);
-      }),
-    )
-  ).filter((g) => g !== null) as FileResult[];
+  const slpGamesPromise = Promise.all(
+    fullSlpPaths.map((fullPath) => {
+      return process(fullPath);
+    }),
+  );
+  const fileSizesPromise = Promise.all(
+    fullSlpPaths.map(
+      async (fullPath): Promise<number> => {
+        const stat = await fs.stat(fullPath);
+        return stat.size;
+      },
+    ),
+  );
+
+  const [slpGames, fileSizes] = await Promise.all([slpGamesPromise, fileSizesPromise]);
 
   // Indicate that loading is complete
   callback(total, total);
 
   return {
-    files: slpGames,
-    fileErrorCount,
+    files: slpGames.filter(exists),
+    fileErrorCount: total - fileValidCount,
+    totalBytes: fileSizes.reduce((acc, size) => acc + size, 0),
   };
 }
diff --git a/src/replays/types.ts b/src/replays/types.ts
index bbffa37e9..8e9c90901 100644
--- a/src/replays/types.ts
+++ b/src/replays/types.ts
@@ -18,6 +18,7 @@ export interface FolderResult {
 
 export interface FileLoadResult {
   files: FileResult[];
+  totalBytes: number;
   fileErrorCount: number;
 }