diff --git a/apps/files_external/ajax/removeMountPoint.php b/apps/files_external/ajax/removeMountPoint.php
index aa44642620..2f5dbcfdba 100644
--- a/apps/files_external/ajax/removeMountPoint.php
+++ b/apps/files_external/ajax/removeMountPoint.php
@@ -3,6 +3,15 @@
 OCP\JSON::checkAppEnabled('files_external');
 OCP\JSON::callCheck();
 
+if (!isset($_POST['isPersonal']))
+	return;
+if (!isset($_POST['mountPoint']))
+	return;
+if (!isset($_POST['mountType']))
+	return;
+if (!isset($_POST['applicable']))
+	return;
+
 if ($_POST['isPersonal'] == 'true') {
 	OCP\JSON::checkLoggedIn();
 	$isPersonal = true;
@@ -10,4 +19,5 @@ if ($_POST['isPersonal'] == 'true') {
 	OCP\JSON::checkAdminUser();
 	$isPersonal = false;
 }
+
 OC_Mount_Config::removeMountPoint($_POST['mountPoint'], $_POST['mountType'], $_POST['applicable'], $isPersonal);
diff --git a/apps/files_external/lib/smb.php b/apps/files_external/lib/smb.php
index 96778b0b2e..e17ce1168d 100644
--- a/apps/files_external/lib/smb.php
+++ b/apps/files_external/lib/smb.php
@@ -45,6 +45,7 @@ class SMB extends \OC\Files\Storage\StreamWrapper{
 		if (substr($path, -1)=='/') {
 			$path=substr($path, 0, -1);
 		}
+		$path = urlencode($path);
 		return 'smb://'.$this->user.':'.$this->password.'@'.$this->host.$this->share.$this->root.$path;
 	}
 
@@ -59,11 +60,6 @@ class SMB extends \OC\Files\Storage\StreamWrapper{
 		}
 	}
 
-	public function filetype($path) {
-		// using opendir causes the same amount of requests and caches the content of the folder in one go
-		return (bool)@$this->opendir($path) ? 'dir' : 'file';
-	}
-
 	/**
 	 * check if a file or folder has been updated since $time
 	 * @param string $path
diff --git a/apps/files_external/templates/settings.php b/apps/files_external/templates/settings.php
index 78ca1c87fe..df8d7d6e2b 100644
--- a/apps/files_external/templates/settings.php
+++ b/apps/files_external/templates/settings.php
@@ -83,7 +83,7 @@
 							<select class="chzn-select"
 									multiple style="width:20em;"
 									data-placeholder="<?php echo $l->t('None set'); ?>">
-								<option value="all"><?php echo $l->t('All Users'); ?></option>
+								<option value="all" <?php if (isset($mount['applicable']['users']) && in_array('all', $mount['applicable']['users'])) echo 'selected="selected"';?> ><?php echo $l->t('All Users'); ?></option>
 								<optgroup label="<?php echo $l->t('Groups'); ?>">
 								<?php foreach ($_['groups'] as $group): ?>
 									<option value="<?php echo $group; ?>(group)"