diff --git a/build/main.js b/build/main.js
index 5ad1283..5707cb5 100644
--- a/build/main.js
+++ b/build/main.js
@@ -30447,7 +30447,7 @@ var Directory = (function (_Component) {
       var input = undefined,
           label = undefined;
       if (this.props.selectView) {
-        input = _react2['default'].createElement('input', { type: 'checkbox', id: checkId, checked: this.props.selected, readOnly: true });
+        input = _react2['default'].createElement('input', { type: 'checkbox', id: checkId, checked: this.props.selected, readOnly: true, ref: 'check' });
         label = _react2['default'].createElement('label', { htmlFor: checkId });
       }
 
@@ -30476,6 +30476,8 @@ var Directory = (function (_Component) {
   }, {
     key: 'peek',
     value: function peek() {
+      if (document.querySelector('#file-menu.active')) return;
+
       var file = _store2['default'].getState().get('files')[this.props.index];
 
       _store2['default'].dispatch((0, _actionsChangedir2['default'])(file.path.replace(/^\//, '') + file.name));
@@ -30664,7 +30666,7 @@ var File = (function (_Component) {
       var input = undefined,
           label = undefined;
       if (this.props.selectView) {
-        input = _react2['default'].createElement('input', { type: 'checkbox', id: checkId, checked: this.props.selected, readOnly: true });
+        input = _react2['default'].createElement('input', { type: 'checkbox', id: checkId, checked: this.props.selected, readOnly: true, ref: 'check' });
         label = _react2['default'].createElement('label', { htmlFor: checkId });
       }
 
@@ -30693,8 +30695,8 @@ var File = (function (_Component) {
   }, {
     key: 'open',
     value: function open(e) {
-      e.preventDefault();
-      e.stopPropagation();
+      if (document.querySelector('#file-menu.active')) return;
+
       var file = _store2['default'].getState().get('files')[this.props.index];
 
       var name = file.type === 'application/pdf' ? 'view' : 'open';
@@ -30905,7 +30907,7 @@ exports['default'] = {
     var left = window.innerWidth / 2 - _componentsMenu.MENU_WIDTH / 2,
         top = y + height / 2 + MENU_TOP_SPACE;
 
-    var dialogHeight = document.getElementById('fileMenu').offsetHeight;
+    var dialogHeight = document.getElementById('file-menu').offsetHeight;
 
     var diff = window.innerHeight - (dialogHeight + top);
     if (diff <= 0) {
@@ -30917,16 +30919,19 @@ exports['default'] = {
   },
 
   select: function select(e) {
-    e.preventDefault();
-    e.stopPropagation();
+    if (document.querySelector('#file-menu.active')) return;
 
     var current = (store.getState().get('activeFile') || []).slice(0);
     var file = store.getState().get('files')[this.props.index];
 
+    var check = _react2['default'].findDOMNode(this.refs.check);
+
     if (current.indexOf(file) > -1) {
       current.splice(current.indexOf(file), 1);
+      check.checked = false;
     } else {
       current.push(file);
+      check.checked = true;
     }
     store.dispatch((0, _actionsFile.active)(current));
   }
@@ -31318,8 +31323,8 @@ var Root = (function (_Component) {
         _react2['default'].createElement(_componentsNavigation2['default'], null),
         _react2['default'].createElement(_componentsFileList2['default'], null),
         _react2['default'].createElement(_componentsToolbar2['default'], null),
-        _react2['default'].createElement(FileMenu, { id: 'fileMenu' }),
-        _react2['default'].createElement(MoreMenu, { id: 'moreMenu' }),
+        _react2['default'].createElement(FileMenu, { id: 'file-menu' }),
+        _react2['default'].createElement(MoreMenu, { id: 'more-menu' }),
         _react2['default'].createElement(RenameDialog, null),
         _react2['default'].createElement(DeleteDialog, null),
         _react2['default'].createElement(ErrorDialog, null),
@@ -32750,8 +32755,8 @@ function humanSize(size) {
   for (var key in sizes) {
     var value = sizes[key];
 
-    if (size > value) {
-      return Math.round(size / value) + key;
+    if (size >= value) {
+      return Math.abs(Math.round(size / value)) + key;
     }
   }
 }
diff --git a/src/js/components/directory.js b/src/js/components/directory.js
index b1ab90e..41b79ca 100644
--- a/src/js/components/directory.js
+++ b/src/js/components/directory.js
@@ -14,7 +14,7 @@ export default class Directory extends Component {
 
     let input, label;
     if (this.props.selectView) {
-      input = <input type='checkbox' id={checkId} checked={this.props.selected} readOnly />;
+      input = <input type='checkbox' id={checkId} checked={this.props.selected} readOnly ref='check' />;
       label = <label htmlFor={checkId}></label>;
     }
 
@@ -37,6 +37,8 @@ export default class Directory extends Component {
   }
 
   peek() {
+    if (document.querySelector('#file-menu.active')) return;
+
     let file = store.getState().get('files')[this.props.index];
 
     store.dispatch(changedir(file.path.replace(/^\//, '') + file.name));
diff --git a/src/js/components/file.js b/src/js/components/file.js
index dc47894..b7fc86f 100644
--- a/src/js/components/file.js
+++ b/src/js/components/file.js
@@ -14,7 +14,7 @@ export default class File extends Component {
 
     let input, label;
     if (this.props.selectView) {
-      input = <input type='checkbox' id={checkId} checked={this.props.selected} readOnly />;
+      input = <input type='checkbox' id={checkId} checked={this.props.selected} readOnly ref='check' />;
       label = <label htmlFor={checkId}></label>;
     }
 
@@ -37,8 +37,8 @@ export default class File extends Component {
   }
 
   open(e) {
-    e.preventDefault();
-    e.stopPropagation();
+    if (document.querySelector('#file-menu.active')) return;
+
     let file = store.getState().get('files')[this.props.index];
 
     let name = file.type === 'application/pdf' ? 'view' : 'open';
diff --git a/src/js/components/mixins/entry.js b/src/js/components/mixins/entry.js
index 4095d2a..fc38338 100644
--- a/src/js/components/mixins/entry.js
+++ b/src/js/components/mixins/entry.js
@@ -17,7 +17,7 @@ export default {
     let left = window.innerWidth / 2 - MENU_WIDTH / 2,
         top  = y + height / 2 + MENU_TOP_SPACE;
 
-    let dialogHeight = document.getElementById('fileMenu').offsetHeight;
+    let dialogHeight = document.getElementById('file-menu').offsetHeight;
 
     let diff = window.innerHeight - (dialogHeight + top);
     if (diff <= 0) {
@@ -29,16 +29,19 @@ export default {
   },
 
   select(e) {
-    e.preventDefault();
-    e.stopPropagation();
+    if (document.querySelector('#file-menu.active')) return;
 
     let current = (store.getState().get('activeFile') || []).slice(0);
     let file = store.getState().get('files')[this.props.index];
 
+    let check = React.findDOMNode(this.refs.check);
+
     if (current.indexOf(file) > -1) {
       current.splice(current.indexOf(file), 1);
+      check.checked = false;
     } else {
       current.push(file)
+      check.checked = true;
     }
     store.dispatch(active(current));
   }
diff --git a/src/js/components/root.js b/src/js/components/root.js
index d21b430..67a7f83 100644
--- a/src/js/components/root.js
+++ b/src/js/components/root.js
@@ -39,8 +39,8 @@ export default class Root extends Component {
         <FileList />
         <Toolbar />
 
-        <FileMenu id='fileMenu' />
-        <MoreMenu id='moreMenu' />
+        <FileMenu id='file-menu' />
+        <MoreMenu id='more-menu' />
 
         <RenameDialog />
         <DeleteDialog />
diff --git a/src/js/utils.js b/src/js/utils.js
index fd5754d..08441f2 100644
--- a/src/js/utils.js
+++ b/src/js/utils.js
@@ -39,14 +39,14 @@ const sizes = {
   'GB': Math.pow(2, 30),
   'MB': Math.pow(2, 20),
   'KB': Math.pow(2, 10),
-  'B': 0
+  'B': -1
 }
 export function humanSize(size) {
   for (let key in sizes) {
     let value = sizes[key];
 
     if (size >= value) {
-      return Math.round(size / value) + key;
+      return Math.abs(Math.round(size / value)) + key;
     }
   }
 }