diff --git a/www/common/common-ui-elements.js b/www/common/common-ui-elements.js
index ab7d304f3..5d2f15f40 100644
--- a/www/common/common-ui-elements.js
+++ b/www/common/common-ui-elements.js
@@ -679,17 +679,27 @@ define([
                 button
                 .click(common.prepareFeedback(type))
                 .click(function() {
-                    var msg = common.isLoggedIn() ? Messages.forgetPrompt : Messages.fm_removePermanentlyDialog;
-                    UI.confirm(msg, function (yes) {
-                        if (!yes) { return; }
-                        sframeChan.query('Q_MOVE_TO_TRASH', null, function (err) {
-                            if (err) { return void callback(err); }
-                            var cMsg = common.isLoggedIn() ? Messages.movedToTrash : Messages.deleted;
-                            var msg = common.fixLinks($('<div>').html(cMsg));
-                            UI.alert(msg);
-                            callback();
+                    sframeChan.query('Q_IS_ONLY_IN_SHARED_FOLDER', null, function (err, res) {
+                        if (err || res.error) { return void console.log(err || res.error); }
+                        var msg = Messages.forgetPrompt;
+                        if (res) {
+                            UI.alert("WIP: This pad is only in a shared folder. You can't move it to the trash. You can use your CryptDrive if you want to delete it from the folder."); // XXX
                             return;
+                        } else if (!common.isLoggedIn()) {
+                            msg = Messages.fm_removePermanentlyDialog;
+                        }
+                        UI.confirm(msg, function (yes) {
+                            if (!yes) { return; }
+                            sframeChan.query('Q_MOVE_TO_TRASH', null, function (err) {
+                                if (err) { return void callback(err); }
+                                var cMsg = common.isLoggedIn() ? Messages.movedToTrash : Messages.deleted;
+                                var msg = common.fixLinks($('<div>').html(cMsg));
+                                UI.alert(msg);
+                                callback();
+                                return;
+                            });
                         });
+
                     });
                 });
                 break;
diff --git a/www/common/cryptpad-common.js b/www/common/cryptpad-common.js
index 3011618cd..11d5bda10 100644
--- a/www/common/cryptpad-common.js
+++ b/www/common/cryptpad-common.js
@@ -311,6 +311,13 @@ define([
         });
     };
 
+    common.isOnlyInSharedFolder = function (data, cb) {
+        postMessage("IS_ONLY_IN_SHARED_FOLDER", data, function (obj) {
+            if (obj && obj.error) { return void cb(obj.error); }
+            cb(null, obj);
+        });
+    };
+
     common.setDisplayName = function (value, cb) {
         postMessage("SET_DISPLAY_NAME", value, cb);
     };
diff --git a/www/common/outer/async-store.js b/www/common/outer/async-store.js
index c009459ab..75e376099 100644
--- a/www/common/outer/async-store.js
+++ b/www/common/outer/async-store.js
@@ -691,8 +691,18 @@ define([
         };
 
         // Pads
+        Store.isOnlyInSharedFolder = function (clientId, channel, cb) {
+            var res = store.manager.findChannel(channel);
+
+            // A pad is only in a shared worker if:
+            // 1. this pad is in at least one proxy
+            // 2. no proxy containing this pad is the main drive
+            return cb (res.length && !res.some(function (obj) {
+                // Main drive doesn't have an fId (folder ID)
+                return !obj.fId;
+            }));
+        };
         Store.moveToTrash = function (clientId, data, cb) {
-            // XXX move a pad from a shared folder to the trash?
             var href = Hash.getRelativeHref(data.href);
             store.userObject.forget(href);
             sendDriveEvent('DRIVE_CHANGE', {
diff --git a/www/common/outer/store-rpc.js b/www/common/outer/store-rpc.js
index 96c392f2a..cbecfe684 100644
--- a/www/common/outer/store-rpc.js
+++ b/www/common/outer/store-rpc.js
@@ -41,6 +41,7 @@ define([
             MOVE_TO_TRASH: Store.moveToTrash,
             RESET_DRIVE: Store.resetDrive,
             GET_METADATA: Store.getMetadata,
+            IS_ONLY_IN_SHARED_FOLDER: Store.isOnlyInSharedFolder,
             SET_DISPLAY_NAME: Store.setDisplayName,
             SET_PAD_ATTRIBUTE: Store.setPadAttribute,
             GET_PAD_ATTRIBUTE: Store.getPadAttribute,
diff --git a/www/common/proxy-manager.js b/www/common/proxy-manager.js
index d943ffc22..92ee6097a 100644
--- a/www/common/proxy-manager.js
+++ b/www/common/proxy-manager.js
@@ -84,6 +84,7 @@ define([
         Object.keys(Env.folders).forEach(function (fId) {
             Env.folders[fId].userObject.findChannels([channel]).forEach(function (id) {
                 ret.push({
+                    fId: fId,
                     data: Env.folders[fId].userObject.getFileData(id),
                     userObject: Env.folders[fId].userObject
                 });
@@ -95,12 +96,15 @@ define([
     var findHref = function (Env, href) {
         var ret = [];
         var id = Env.user.userObject.getIdFromHref(href);
-        ret.push({
-            data: Env.user.userObject.getFileData(id),
-            userObject: Env.user.userObject
-        });
+        if (id) {
+            ret.push({
+                data: Env.user.userObject.getFileData(id),
+                userObject: Env.user.userObject
+            });
+        }
         Object.keys(Env.folders).forEach(function (fId) {
             var id = Env.folders[fId].userObject.getIdFromHref(href);
+            if (!id) { return; }
             ret.push({
                 fId: fId,
                 data: Env.folders[fId].userObject.getFileData(id),
@@ -717,6 +721,7 @@ define([
             addPad: callWithEnv(addPad),
             // Tools
             findChannel: callWithEnv(findChannel),
+            findHref: callWithEnv(findHref),
             user: Env.user,
             folders: Env.folders
         };
diff --git a/www/common/sframe-common-outer.js b/www/common/sframe-common-outer.js
index 8b30aa2e2..7dab590f2 100644
--- a/www/common/sframe-common-outer.js
+++ b/www/common/sframe-common-outer.js
@@ -266,7 +266,7 @@ define([
                         isDeleted: isNewFile && window.location.hash.length > 0,
                         forceCreationScreen: forceCreationScreen,
                         password: password,
-                        channel: secret.channel
+                        channel: secret.channel,
                     };
                     for (var k in additionalPriv) { metaObj.priv[k] = additionalPriv[k]; }
 
@@ -484,6 +484,12 @@ define([
                 cb();
             });
 
+            sframeChan.on('Q_IS_ONLY_IN_SHARED_FOLDER', function (data, cb) {
+                Cryptpad.isOnlyInSharedFolder(secret.channel, function (err, t) {
+                    if (err) { return void cb({error: err}); }
+                    cb(t);
+                });
+            });
 
             // Present mode URL
             sframeChan.on('Q_PRESENT_URL_GET_VALUE', function (data, cb) {
diff --git a/www/common/sframe-protocol.js b/www/common/sframe-protocol.js
index cc41dcbf3..91e5e2215 100644
--- a/www/common/sframe-protocol.js
+++ b/www/common/sframe-protocol.js
@@ -111,6 +111,10 @@ define({
     'Q_GET_PAD_ATTRIBUTE': true,
     'Q_SET_PAD_ATTRIBUTE': true,
 
+    // Check if a pad is only in a shared folder or (also) in the main drive.
+    // This allows us to change the behavior of some buttons (trash icon...)
+    'Q_IS_ONLY_IN_SHARED_FOLDER': true,
+
     // Open/close the File picker (sent from the iframe to the outside)
     'EV_FILE_PICKER_OPEN': true,
     'EV_FILE_PICKER_CLOSE': true,
diff --git a/www/common/userObject.js b/www/common/userObject.js
index 9d3cc738a..6c99d4ae9 100644
--- a/www/common/userObject.js
+++ b/www/common/userObject.js
@@ -308,7 +308,6 @@ define([
                     result = id;
                     return true;
                 }
-                return;
             });
             return result;
         };
diff --git a/www/drive/inner.js b/www/drive/inner.js
index 4de5ef4d6..eae9f1e28 100644
--- a/www/drive/inner.js
+++ b/www/drive/inner.js
@@ -854,7 +854,6 @@ define([
                         hide.push('properties');
                     }
                     // If we're not in the trash nor in a shared folder, hide "remove"
-                    var el = manager.find(path);
                     if (!manager.isInSharedFolder(path)
                             && !$element.is('.cp-app-drive-element-sharedf')) {
                         hide.push('removesf');