diff --git a/app/main.css b/app/main.css
index d7f73cad..3a98d958 100644
--- a/app/main.css
+++ b/app/main.css
@@ -17,6 +17,7 @@
 @import './templates/popup/popup.css';
 @import './templates/selectbox/selectbox.css';
 @import './templates/setPasswordSection/setPasswordSection.css';
+@import './templates/signupDialog/signupDialog.css';
 @import './templates/signupPromo/signupPromo.css';
 @import './templates/title/title.css';
 @import './templates/uploadedFile/uploadedFile.css';
diff --git a/app/templates/expireInfo/index.js b/app/templates/expireInfo/index.js
index e4840425..d0aa7ac7 100644
--- a/app/templates/expireInfo/index.js
+++ b/app/templates/expireInfo/index.js
@@ -3,7 +3,7 @@ const html = require('choo/html');
 const raw = require('choo/html/raw');
 const selectbox = require('../selectbox');
 const timeLimitText = require('../timeLimitText');
-const okDialog = require('../okDialog');
+const signupDialog = require('../signupDialog');
 
 module.exports = function(state, emit) {
   const el = html`<div> ${raw(
@@ -31,7 +31,7 @@ module.exports = function(state, emit) {
       value => {
         const max = state.user.maxDownloads;
         if (value > max) {
-          state.modal = okDialog('todo: this setting requires an account');
+          state.modal = signupDialog();
           value = max;
         }
         state.downloadCount = value;
@@ -54,7 +54,7 @@ module.exports = function(state, emit) {
       value => {
         const max = state.user.maxExpireSeconds;
         if (value > max) {
-          state.modal = okDialog('todo: this setting requires an account');
+          state.modal = signupDialog();
           value = max;
         }
         state.timeLimit = value;
diff --git a/app/templates/modal/index.js b/app/templates/modal/index.js
index 94f184c3..005824bc 100644
--- a/app/templates/modal/index.js
+++ b/app/templates/modal/index.js
@@ -4,7 +4,7 @@ module.exports = function(state, emit) {
   return html`
   <div class="modal" onclick=${close}>
     <div class="modal__box" onclick=${e => e.stopPropagation()}>
-      ${state.modal(state, close)}
+      ${state.modal(state, emit, close)}
     </div>
   </div>`;
 
diff --git a/app/templates/modal/modal.css b/app/templates/modal/modal.css
index 947ea39a..ae1608a1 100644
--- a/app/templates/modal/modal.css
+++ b/app/templates/modal/modal.css
@@ -15,7 +15,6 @@
 
 .modal__box {
   max-width: 480px;
-  max-height: 300px;
   background: var(--pageBGColor);
   border-radius: 4px;
   color: var(--textColor);
diff --git a/app/templates/okDialog/index.js b/app/templates/okDialog/index.js
index 93015ac7..4986c1b9 100644
--- a/app/templates/okDialog/index.js
+++ b/app/templates/okDialog/index.js
@@ -1,7 +1,7 @@
 const html = require('choo/html');
 
 module.exports = function(message) {
-  return function(state, close) {
+  return function(state, emit, close) {
     return html`
     <div class="okDialog">
       <div class="okDialog__message">${message}</div>
diff --git a/app/templates/signupDialog/index.js b/app/templates/signupDialog/index.js
new file mode 100644
index 00000000..83098643
--- /dev/null
+++ b/app/templates/signupDialog/index.js
@@ -0,0 +1,57 @@
+/* globals LIMITS */
+const html = require('choo/html');
+const bytes = require('../../utils').bytes;
+
+// TODO: there's some duplication here with the signin page
+module.exports = function() {
+  return function(state, emit, close) {
+    return html`
+    <div class="signupDialog">
+      <div class="signupDialog__message">
+        ${state.translate('accountBenefitTitle')}
+        <ul>
+          <li>${state.translate('accountBenefitLargeFiles', {
+            size: bytes(LIMITS.MAX_FILE_SIZE)
+          })}</li>
+          <li>${state.translate('accountBenefitExpiry')}</li>
+          <li>${state.translate('accountBenefitSync')}</li>
+        </ul>
+      </div>
+      <form
+        onsubmit=${submitEmail}
+        data-no-csrf>
+        <input
+          id="email-input"
+          type="text"
+          class="signupDialog__emailInput"
+          placeholder=${state.translate('emailEntryPlaceholder')}/>
+        <input
+          class='noDisplay'
+          id="email-submit"
+          type="submit"/>
+      </form>
+      <label class="btn" for="email-submit">
+        ${state.translate('signInMenuOption')}
+      </label>
+      <button
+        class="btn--cancel"
+        title="${state.translate('deletePopupCancel')}"
+        onclick=${close}>${state.translate('deletePopupCancel')}
+      </button>
+    </div>`;
+
+    function submitEmail(event) {
+      event.preventDefault();
+      const el = document.getElementById('email-input');
+      const email = el.value;
+      if (email) {
+        // just check if it's the right shape
+        const a = email.split('@');
+        if (a.length === 2 && a.every(s => s.length > 0)) {
+          return emit('login', email);
+        }
+      }
+      el.value = '';
+    }
+  };
+};
diff --git a/app/templates/signupDialog/signupDialog.css b/app/templates/signupDialog/signupDialog.css
new file mode 100644
index 00000000..018dbcad
--- /dev/null
+++ b/app/templates/signupDialog/signupDialog.css
@@ -0,0 +1,22 @@
+.signupDialog {
+  display: flex;
+  flex-direction: column;
+  max-width: 400px;
+  padding: 16px;
+}
+
+.signupDialog__message {
+  margin: 32px 32px 0 32px;
+}
+
+.signupDialog__emailInput {
+  box-sizing: border-box;
+  height: 40px;
+  width: 100%;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  border-radius: 4px;
+  margin: 16px 0;
+  padding: 0 8px;
+  font-size: 18px;
+  color: var(--lightTextColor);
+}