diff --git a/www/js/types/fileShareTypes.ts b/www/js/types/fileShareTypes.ts
new file mode 100644
index 000000000..89481624d
--- /dev/null
+++ b/www/js/types/fileShareTypes.ts
@@ -0,0 +1,22 @@
+import { ServerData } from './serverData'; 
+
+export type TimeStampData = ServerData<RawTimelineData>;
+
+export type RawTimelineData = {
+    name: string, 
+    ts: number,
+    reading: number,
+};
+
+export interface FsWindow extends Window {
+  requestFileSystem: (
+    type: number,
+    size: number,
+    successCallback: (fs: any) => void,
+    errorCallback?: (error: any) => void
+  ) => void;
+  LocalFileSystem: {
+    TEMPORARY: number;
+    PERSISTENT: number;
+  };
+};