diff --git a/__tests__/utils/fetch.js b/__tests__/utils/fetch.js
new file mode 100644
index 0000000..964bd0c
--- /dev/null
+++ b/__tests__/utils/fetch.js
@@ -0,0 +1,25 @@
+import * as fetch from '../../src/utils/fetch';
+
+describe('utils.fetch#encodeQueryData', () => {
+  test('should create valid query string', () => {
+    const result1 = fetch.encodeQueryData({
+      a: 1,
+      b: true,
+      c: null,
+      d: 'foo',
+      e: undefined
+    });
+
+    const result2 = fetch.encodeQueryData({
+      a: 1,
+      b: {
+        c: {
+          d: 'foo'
+        }
+      }
+    });
+
+    expect(result1).toEqual('a=1&b=true&c=null&d=foo&e=undefined');
+    expect(result2).toEqual('a=1&b=%7B%22c%22%3A%7B%22d%22%3A%22foo%22%7D%7D');
+  });
+});
diff --git a/__tests__/utils/vfs.js b/__tests__/utils/vfs.js
index a291d44..f5ef527 100644
--- a/__tests__/utils/vfs.js
+++ b/__tests__/utils/vfs.js
@@ -67,8 +67,8 @@ describe('utils.vfs#transformReaddir', () => {
     size: 666
   }];
 
-  const check = (options = {}) => vfs.transformReaddir({path: root}, input, options);
-  const checkMap = (options = {}, key = 'filename') => check(options).map(iter => iter[key]);
+  const check = (options = {}, capability = {}) => vfs.transformReaddir({path: root}, input, capability, options);
+  const checkMap = (options = {}, key = 'filename', capability = {}) => check(options, capability).map(iter => iter[key]);
 
   test('Should add parent directory', () => {
     expect(check({
@@ -88,7 +88,7 @@ describe('utils.vfs#transformReaddir', () => {
   test('Should remove dotfiles', () => {
     expect(checkMap({
       showHiddenFiles: false
-    })).toEqual(['..', 'directory', 'xdirectory', 'file', 'xfile']);
+    })).toEqual(['..', 'directory', 'file', 'xdirectory', 'xfile']);
   });
 
   test('Should sort by descending order', () => {
@@ -98,7 +98,7 @@ describe('utils.vfs#transformReaddir', () => {
     });
 
     return expect(result)
-      .toEqual(['..', 'xdirectory', 'directory', 'xfile', 'file']);
+      .toEqual(['..', 'xfile', 'xdirectory', 'file', 'directory']);
   });
 
   test('Should sort by ascending order', () => {
@@ -108,7 +108,7 @@ describe('utils.vfs#transformReaddir', () => {
     });
 
     return expect(result)
-      .toEqual(['..', 'directory', 'xdirectory', 'file', 'xfile']);
+      .toEqual(['..', 'directory', 'file', 'xdirectory', 'xfile']);
   });
 
   test('Should sort by specified column', () => {
@@ -123,6 +123,17 @@ describe('utils.vfs#transformReaddir', () => {
 
     expect(every).toEqual(true);
   });
+
+  test('Should not sort', () => {
+    const result = checkMap({}, 'filename', {
+      foo: {
+        sort: true
+      }
+    });
+
+    return expect(result)
+      .toEqual(['..', 'directory', 'xdirectory', 'file', 'xfile']);
+  });
 });
 
 describe('utils.vfs#getFileIcon', () => {
diff --git a/__tests__/vfs.js b/__tests__/vfs.js
index ca0a76b..4310615 100644
--- a/__tests__/vfs.js
+++ b/__tests__/vfs.js
@@ -79,7 +79,7 @@ describe('VFS', () => {
       .toBeInstanceOf(ArrayBuffer);
   });
 
-  test('writefile - blob', () => {
+  test('#writefile - blob', () => {
     return expect(call('writefile', 'null:/filename', new Blob()))
       .resolves
       .toBe(-1);
diff --git a/src/adapters/vfs/null.js b/src/adapters/vfs/null.js
index c1528f1..061e592 100644
--- a/src/adapters/vfs/null.js
+++ b/src/adapters/vfs/null.js
@@ -34,6 +34,7 @@
  * @param {object} [options] Adapter options
  */
 const nullAdapter = ({
+  capabilities: (path, options) => Promise.resolve({}),
   readdir: (path, options) => Promise.resolve([]),
   readfile: (path, type, options) => Promise.resolve({body: new ArrayBuffer(), mime: 'application/octet-stream'}),
   writefile: (path, data, options) => Promise.resolve(-1),
diff --git a/src/adapters/vfs/system.js b/src/adapters/vfs/system.js
index ceee251..597a73a 100644
--- a/src/adapters/vfs/system.js
+++ b/src/adapters/vfs/system.js
@@ -28,7 +28,7 @@
  * @license Simplified BSD License
  */
 
-const getters = ['exists', 'stat', 'readdir', 'readfile'];
+const getters = ['capabilities', 'exists', 'stat', 'readdir', 'readfile'];
 
 const requester = core => (fn, body, type, options = {}) =>
   core.request(`/vfs/${fn}`, {
@@ -57,9 +57,16 @@ const methods = (core, request) => {
       .then(({body}) => body);
 
   return {
+    capabilities: ({path}, options) => request('capabilities', {
+      path,
+      options
+    }, 'json').then(({body}) => {
+      return body;
+    }),
+
     readdir: ({path}, options) => request('readdir', {
       path,
-      options: {}
+      options,
     }, 'json').then(({body}) => body),
 
     readfile: ({path}, type, options) =>
@@ -89,7 +96,7 @@ const methods = (core, request) => {
     stat: passthrough('stat'),
 
     url: ({path}, options) => Promise.resolve(
-      core.url(`/vfs/readfile?path=${encodeURIComponent(path)}`)
+      core.url(`/vfs/readfile?path.s=${encodeURIComponent(path)}`)
     ),
 
     search: ({path}, pattern, options) =>
@@ -102,7 +109,7 @@ const methods = (core, request) => {
     download: ({path}, options = {}) => {
       const json = encodeURIComponent(JSON.stringify({download: true}));
 
-      return Promise.resolve(`/vfs/readfile?options=${json}&path=` + encodeURIComponent(path))
+      return Promise.resolve(`/vfs/readfile?options=${json}&path.s=` + encodeURIComponent(path))
         .then(url => {
           return (options.target || window).open(url);
         });
diff --git a/src/filesystem.js b/src/filesystem.js
index 0348cef..d460654 100644
--- a/src/filesystem.js
+++ b/src/filesystem.js
@@ -63,6 +63,7 @@ import merge from 'deepmerge';
  * Filesystem Adapter Methods
  * TODO: typedef
  * @typedef {Object} FilesystemAdapterMethods
+ * @property {Function} capabilities
  * @property {Function} readdir
  * @property {Function} readfile
  * @property {Function} writefile
diff --git a/src/utils/fetch.js b/src/utils/fetch.js
index 46508e9..6b23472 100644
--- a/src/utils/fetch.js
+++ b/src/utils/fetch.js
@@ -28,13 +28,22 @@
  * @license Simplified BSD License
  */
 
-/*
- * Creates URL request path
- */
-const encodeQueryData = data => Object.keys(data)
-  .filter(k => typeof data[k] !== 'object')
-  .map(k => encodeURIComponent(k) + '=' + encodeURIComponent(data[k]))
-  .join('&');
+
+// /*
+//  * Creates URL request path
+//  */
+export const encodeQueryData = (data) => {
+  const replacer = (k, v)=>(v === undefined ? null : v);
+  const pairs = Object.entries(data).map(([key, val]) => {
+    const isNull = val === null;
+    if (typeof val === 'object' && !isNull) {
+      return `${encodeURIComponent(key)}=${encodeURIComponent(JSON.stringify(val, replacer))}`;
+    } else {
+      return `${encodeURIComponent(key)}=${encodeURIComponent(val)}`;
+    }
+  });
+  return pairs.join('&');
+};
 
 const bodyTypes = [
   window.ArrayBuffer,
@@ -65,7 +74,9 @@ const createFetchOptions = (url, options, type) => {
   }
 
   if (fetchOptions.body && fetchOptions.method.toLowerCase() === 'get') {
-    url += '?' + encodeQueryData(fetchOptions.body);
+    if(encodeQueryData(fetchOptions.body) !== '') {
+      url += '?' + encodeQueryData(fetchOptions.body);
+    }
     delete fetchOptions.body;
   }
 
diff --git a/src/utils/vfs.js b/src/utils/vfs.js
index a89ad95..c462761 100644
--- a/src/utils/vfs.js
+++ b/src/utils/vfs.js
@@ -78,6 +78,13 @@ const sortDefault = (k, d) => (a, b) =>
       ? (d === 'asc' ? 1 : 0)
       : (d === 'asc' ? 0 : 1));
 
+/*
+ * Sort by educated guess
+ */
+const sortAscii = (k, d) => (a, b) => d === 'asc'
+  ? (a[k] < b[k]) ? -1 : 1
+  : (a[k] < b[k]) ? 1 : -1;
+
 /*
  * Sorts an array of files
  */
@@ -86,6 +93,8 @@ const sortFn = t => {
     return sortString;
   } else if (t === 'date') {
     return sortDate;
+  } else if (t === 'ascii') {
+    return sortAscii;
   }
 
   return sortDefault;
@@ -175,6 +184,7 @@ export const humanFileSize = (bytes, si = false) => {
  * Transforms a readdir result
  * @param {object} root The path to the readdir root
  * @param Object[] files An array of readdir results
+ * @param Object[] capabilityCache An object of mount point capabilities
  * @param {object} options Options
  * @param {Boolean} [options.showHiddenFiles=false] Show hidden files
  * @param {Function} [options.filter] A filter
@@ -182,7 +192,12 @@ export const humanFileSize = (bytes, si = false) => {
  * @param {string} [options.sortDir='asc'] Sort in this direction
  * @return {Object[]}
  */
-export const transformReaddir = ({path}, files, options = {}) => {
+export const transformReaddir = ({path}, files, capabilityCache, options = {}) => {
+  const mountPoint = path => path.split(':/')[0];
+  let mountPointSort = false;
+  if(capabilityCache[mountPoint(path)] !== undefined) {
+    mountPointSort = capabilityCache[mountPoint(path)].sort;
+  }
   options = {
     showHiddenFiles: false,
     sortBy: 'filename',
@@ -191,48 +206,44 @@ export const transformReaddir = ({path}, files, options = {}) => {
   };
 
   let {sortDir, sortBy, filter} = options;
+
   if (typeof filter !== 'function') {
     filter = () => true;
   }
 
-  if (['asc', 'desc'].indexOf(sortDir) === -1) {
-    sortDir = 'asc';
-  }
-
   const filterHidden = options.showHiddenFiles
     ? () => true
     : file => file.filename.substr(0, 1) !== '.';
 
-  const sorter = sortMap[sortBy]
-    ? sortMap[sortBy]
-    : sortFn('string');
-
   const modify = (file) => ({
     ...file,
     humanSize: humanFileSize(file.size)
   });
 
-  // FIXME: Optimize this to one chain!
+  let sortedSpecial = [];
+  let sortedFiles = [];
 
-  const sortedSpecial = createSpecials(path)
-    .sort(sorter(sortBy, sortDir))
+  sortedSpecial = createSpecials(path)
     .map(modify);
-
-  const sortedDirectories = files.filter(file => file.isDirectory)
-    .sort(sorter(sortBy, sortDir))
-    .filter(filterHidden)
+  sortedFiles = files.filter(filterHidden)
     .filter(filter)
     .map(modify);
 
-  const sortedFiles = files.filter(file => !file.isDirectory)
-    .sort(sorter(sortBy, sortDir))
-    .filter(filterHidden)
-    .filter(filter)
-    .map(modify);
+  if(!mountPointSort) {
+    if (['asc', 'desc'].indexOf(sortDir) === -1) {
+      sortDir = 'asc';
+    }
+    const sorter = sortMap[sortBy]
+      ? sortMap[sortBy]
+      : sortFn('ascii');
+    sortedSpecial = sortedSpecial
+      .sort(sorter(sortBy, sortDir));
+    sortedFiles = sortedFiles
+      .sort(sorter(sortBy, sortDir));
+  }
 
   return [
     ...sortedSpecial,
-    ...sortedDirectories,
     ...sortedFiles
   ];
 };
diff --git a/src/vfs.js b/src/vfs.js
index 505ff14..833e06f 100644
--- a/src/vfs.js
+++ b/src/vfs.js
@@ -60,6 +60,9 @@ import {
  * @property {object} [stat]
  */
 
+// Cache the capability of each mount point
+let capabilityCache = {};
+
 // Makes sure our input paths are object(s)
 const pathToObject = path => ({
   id: null,
@@ -69,11 +72,36 @@ const pathToObject = path => ({
 // Handles directory listing result(s)
 const handleDirectoryList = (path, options) => result =>
   Promise.resolve(result.map(stat => createFileIter(stat)))
-    .then(result => transformReaddir(pathToObject(path), result, {
+    .then(result => transformReaddir(pathToObject(path), result, capabilityCache, {
       showHiddenFiles: options.showHiddenFiles !== false,
       filter: options.filter
     }));
 
+const filterOptions = (ignore, options) => Object.fromEntries(
+  Object
+    .entries(options)
+    .filter(([k]) => !ignore.includes(k))
+);
+
+/**
+ * Get vfs capabilities
+ *
+ * @param {string|VFSFile} path The path of a file
+ * @param {VFSMethodOptions} [options] Options
+ * @return {Promise<object[]>} An object of capabilities
+ */
+export const capabilities = (adapter, mount) => (path, options) => {
+  const cached = capabilityCache[mount.name];
+  if (cached) {
+    return Promise.resolve(cached);
+  }
+  return adapter.capabilities(pathToObject(path), options, mount)
+    .then(capabilities => {
+      capabilityCache[mount.name] = capabilities;
+      return capabilities;
+    });
+};
+
 /**
  * Read a directory
  *
@@ -82,7 +110,7 @@ const handleDirectoryList = (path, options) => result =>
  * @return {Promise<object[]>} A list of files
  */
 export const readdir = (adapter, mount) => (path, options = {}) =>
-  adapter.readdir(pathToObject(path), options, mount)
+  adapter.readdir(pathToObject(path), filterOptions(['filter'], options), mount)
     .then(handleDirectoryList(path, options));
 
 /**