diff --git a/__tests__/google-picker.test.js b/__tests__/google-picker.test.js
index f96ad0c..c952c1f 100644
--- a/__tests__/google-picker.test.js
+++ b/__tests__/google-picker.test.js
@@ -21,15 +21,19 @@ describe("pickDriveFolder", () => {
     const fakePicker = { setVisible: jest.fn() };
     const fakeGoogle = {
       picker: {
-        ViewId: { FOLDERS: "folders" },
+        ViewId: { FOLDERS: "folders", DOCS: "docs" },
         Action: { PICKED: "picked", CANCEL: "cancel" },
+        Feature: { SUPPORT_DRIVES: "supportDrives" },
         DocsView: jest.fn().mockImplementation(() => ({
+          setParent: jest.fn().mockReturnThis(),
           setMimeTypes: jest.fn().mockReturnThis(),
           setSelectFolderEnabled: jest.fn().mockReturnThis(),
           setIncludeFolders: jest.fn().mockReturnThis(),
+          setEnableDrives: jest.fn().mockReturnThis(),
         })),
         PickerBuilder: jest.fn().mockImplementation(() => ({
           addView: jest.fn().mockReturnThis(),
+          enableFeature: jest.fn().mockReturnThis(),
           setOAuthToken: jest.fn().mockReturnThis(),
           setDeveloperKey: jest.fn().mockReturnThis(),
           setAppId: jest.fn().mockReturnThis(),
diff --git a/functions/src/__tests__/providers-gdrive.test.js b/functions/src/__tests__/providers-gdrive.test.js
index 29f0ad2..59906ec 100644
--- a/functions/src/__tests__/providers-gdrive.test.js
+++ b/functions/src/__tests__/providers-gdrive.test.js
@@ -104,7 +104,7 @@ describe("1. writeSessionFile success", () => {
     expect(mockFetch).toHaveBeenCalledTimes(1);
     const { url, options } = callArgs(0);
 
-    expect(url).toBe(`${API_BASE}/upload/drive/v3/files?uploadType=multipart`);
+    expect(url).toBe(`${API_BASE}/upload/drive/v3/files?uploadType=multipart&supportsAllDrives=true`);
     expect(options.method).toBe("POST");
     expect(header(options.headers, "Authorization")).toBe("Bearer test-token");
 
@@ -217,7 +217,7 @@ describe("2. writeSessionFile subfolder", () => {
     });
 
     const uploadCall = callArgs(2);
-    expect(uploadCall.url).toBe(`${API_BASE}/upload/drive/v3/files?uploadType=multipart`);
+    expect(uploadCall.url).toBe(`${API_BASE}/upload/drive/v3/files?uploadType=multipart&supportsAllDrives=true`);
     const uploadBody = uploadCall.options.body.toString();
     expect(uploadBody).toContain('"name":"file.csv"');
     expect(uploadBody).toContain('"parents":["sub-folder-id"]');
@@ -510,7 +510,7 @@ describe("5. updateFile", () => {
 
     expect(mockFetch).toHaveBeenCalledTimes(1);
     const { url, options } = callArgs(0);
-    expect(url).toBe(`${API_BASE}/upload/drive/v3/files/gdrive-existing-1?uploadType=media`);
+    expect(url).toBe(`${API_BASE}/upload/drive/v3/files/gdrive-existing-1?uploadType=media&supportsAllDrives=true`);
     expect(options.method).toBe("PATCH");
     expect(header(options.headers, "Authorization")).toBe("Bearer test-token");
     expect(options.body).toBe("updated-data");
@@ -616,7 +616,7 @@ describe("7. downloadFile", () => {
 
     expect(mockFetch).toHaveBeenCalledTimes(1);
     const { url, options } = callArgs(0);
-    expect(url).toBe(`${API_BASE}/drive/v3/files/gdrive-file-9?alt=media`);
+    expect(url).toBe(`${API_BASE}/drive/v3/files/gdrive-file-9?alt=media&supportsAllDrives=true`);
     expect(options.method).toBe("GET");
     expect(header(options.headers, "Authorization")).toBe("Bearer test-token");
 
diff --git a/functions/src/providers/gdrive.ts b/functions/src/providers/gdrive.ts
index a863b75..6eee8ce 100644
--- a/functions/src/providers/gdrive.ts
+++ b/functions/src/providers/gdrive.ts
@@ -119,6 +119,10 @@ async function findFolder(
   const url = new URL(`${getApiBase()}/drive/v3/files`);
   const q = `name='${escapeQueryValue(name)}' and '${parentId}' in parents and mimeType='${FOLDER_MIME}' and trashed=false`;
   url.searchParams.set("q", q);
+  // Shared Drives require these on every list/query call, or folders that
+  // live in a shared drive are invisible to the query.
+  url.searchParams.set("supportsAllDrives", "true");
+  url.searchParams.set("includeItemsFromAllDrives", "true");
 
   const response = await fetch(url.toString(), {
     method: "GET",
@@ -136,7 +140,7 @@ async function findFolder(
 }
 
 async function createFolder(auth: ResolvedAuth, name: string, parentId: string): Promise<string> {
-  const response = await fetch(`${getApiBase()}/drive/v3/files`, {
+  const response = await fetch(`${getApiBase()}/drive/v3/files?supportsAllDrives=true`, {
     method: "POST",
     headers: {
       ...authHeaders(auth),
@@ -252,7 +256,7 @@ export const gdriveProvider: StorageProvider = {
       meta.contentType
     );
 
-    const response = await fetch(`${getApiBase()}/upload/drive/v3/files?uploadType=multipart`, {
+    const response = await fetch(`${getApiBase()}/upload/drive/v3/files?uploadType=multipart&supportsAllDrives=true`, {
       method: "POST",
       headers: {
         ...authHeaders(auth),
@@ -288,7 +292,7 @@ export const gdriveProvider: StorageProvider = {
     meta: FileMeta
   ): Promise<WriteResult> {
     const response = await fetch(
-      `${getApiBase()}/upload/drive/v3/files/${existingFileRef.id}?uploadType=media`,
+      `${getApiBase()}/upload/drive/v3/files/${existingFileRef.id}?uploadType=media&supportsAllDrives=true`,
       {
         method: "PATCH",
         headers: {
@@ -337,6 +341,10 @@ export const gdriveProvider: StorageProvider = {
         url.searchParams.set("q", q);
         url.searchParams.set("fields", "nextPageToken,files(id,name,mimeType)");
         url.searchParams.set("pageSize", "1000");
+        // Shared Drives require these on every list/query call, or folders
+        // that live in a shared drive are invisible to the query.
+        url.searchParams.set("supportsAllDrives", "true");
+        url.searchParams.set("includeItemsFromAllDrives", "true");
         if (pageToken) {
           url.searchParams.set("pageToken", pageToken);
         }
@@ -378,7 +386,7 @@ export const gdriveProvider: StorageProvider = {
     _container: ContainerRef,
     fileRef: FileRef
   ): Promise<DownloadResult> {
-    const response = await fetch(`${getApiBase()}/drive/v3/files/${fileRef.id}?alt=media`, {
+    const response = await fetch(`${getApiBase()}/drive/v3/files/${fileRef.id}?alt=media&supportsAllDrives=true`, {
       method: "GET",
       headers: authHeaders(auth),
     });
diff --git a/lib/google-picker.js b/lib/google-picker.js
index b5ed252..8299fc4 100644
--- a/lib/google-picker.js
+++ b/lib/google-picker.js
@@ -101,13 +101,29 @@ export async function pickDriveFolder({ accessToken, apiKey, appId }) {
 
   return new Promise((resolve, reject) => {
     try {
-      const view = new google.picker.DocsView(google.picker.ViewId.FOLDERS)
+      // A DOCS view rooted at My Drive (setParent "root") gives a navigable
+      // folder tree with a breadcrumb path -- unlike ViewId.FOLDERS, which
+      // renders every folder in one flat list with no hierarchy. Restricting
+      // mimeTypes to folders keeps files out, so the user only sees and picks
+      // folders while still drilling down through the tree.
+      const myDriveView = new google.picker.DocsView(google.picker.ViewId.DOCS)
+        .setParent("root")
         .setMimeTypes("application/vnd.google-apps.folder")
-        .setSelectFolderEnabled(true)
-        .setIncludeFolders(true);
+        .setIncludeFolders(true)
+        .setSelectFolderEnabled(true);
+
+      // A second DOCS view (setEnableDrives) surfaces Shared Drives as their
+      // own navigable, folder-only tree alongside My Drive above.
+      const sharedDrivesView = new google.picker.DocsView(google.picker.ViewId.DOCS)
+        .setEnableDrives(true)
+        .setMimeTypes("application/vnd.google-apps.folder")
+        .setIncludeFolders(true)
+        .setSelectFolderEnabled(true);
 
       const picker = new google.picker.PickerBuilder()
-        .addView(view)
+        .addView(myDriveView)
+        .addView(sharedDrivesView)
+        .enableFeature(google.picker.Feature.SUPPORT_DRIVES)
         .setOAuthToken(accessToken)
         .setDeveloperKey(apiKey)
         .setAppId(appId)
diff --git a/pages/admin/new.js b/pages/admin/new.js
index 5caf100..c82ebd4 100644
--- a/pages/admin/new.js
+++ b/pages/admin/new.js
@@ -334,6 +334,7 @@ function NewExperimentForm() {
                 <HStack gap={3}>
                   <Button
                     variant="outline"
+                    colorPalette="brandTeal"
                     size="md"
                     loading={folderPickerLoading}
                     onClick={handleChooseFolder}