diff --git a/README.md b/README.md
index cf1069a..07bbc73 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,6 @@ repository.
 
 - [v86](https://github.com/copy/v86)
 - [xterm.js](https://github.com/xtermjs/xterm.js)
-- [tailwindcss](https://tailwindcss.com/)
 - [bun](https://bun.sh)
 - [vite](https://vitejs.dev/)
 
diff --git a/index.html b/index.html
index 05f26d9..018da3f 100644
--- a/index.html
+++ b/index.html
@@ -30,12 +30,17 @@
         <a class="toolbar-button" href="https://github.com/daipham3213" _target="_blank" rel="noopener noreferrer">
           <img class="botton-img" id="github" alt="GitHub - daipham3213" src="/img/github.svg" width="16" height="16" />
         </a>
-        <a class="toolbar-button" href="https://review.opendev.org/q/owner:daipham.3213@gmail.com" _target="_blank" rel="noopener noreferrer">
-          <img class="button-img" id="opendev" alt="OpenDev - daipham.3213@gmail.com" src="/img/opendev.svg" width="16" height="16" />
+        <a class="toolbar-button" href="https://review.opendev.org/q/owner:daipham.3213@gmail.com" _target="_blank"
+          rel="noopener noreferrer">
+          <img class="button-img" id="opendev" alt="OpenDev - daipham.3213@gmail.com" src="/img/opendev.svg" width="16"
+            height="16" />
         </a>
-        <a class="toolbar-button" href="https://www.linkedin.com/in/daipham-3213" _target="_blank" rel="noopener noreferrer">
-          <img class="button-img" id="linkedin" alt="LinkedIn - daipham-3213" src="/img/linkedin.svg" width="16" height="16" />
+        <a class="toolbar-button" href="https://www.linkedin.com/in/daipham-3213" _target="_blank"
+          rel="noopener noreferrer">
+          <img class="button-img" id="linkedin" alt="LinkedIn - daipham-3213" src="/img/linkedin.svg" width="16"
+            height="16" />
         </a>
+        <button id="upload-button" title="Upload File" style="display: none;">Upload</button>
       </div>
     </div>
     <div id="terminal"></div>
@@ -46,6 +51,20 @@ <h6>Loading resources, please wait...</h6>
       <canvas id="serial-canvas" width="800" height="600"></canvas>
     </div>
   </div>
+  <div id="modal-overlay">
+    <div id="upload-modal">
+      <button id="modal-close-button" title="Close">&times;</button>
+      <h3>Upload File</h3>
+      <div class="form-group">
+        <p> All files will be uploaded to `/home/daiplg` directory. </p>
+      </div>
+      <div class="form-group">
+        <button id="select-file-button">Select File...</button>
+        <input type="file" id="file-input" style="display: none;" multiple>
+        <span id="selected-filename">No file selected</span>
+      </div>
+    </div>
+  </div>
   <script src="/v86/libv86.js"></script>
   <script type="module" src="/src/js/main.js"></script>
 </body>
diff --git a/public/contents.json b/public/contents.json
new file mode 100644
index 0000000..9306609
--- /dev/null
+++ b/public/contents.json
@@ -0,0 +1 @@
+{"fsroot":[["daiplg",4096,1743524547,16877,0,0,[]]],"version":3,"size":4096}
\ No newline at end of file
diff --git a/src/js/main.js b/src/js/main.js
index ce8e7b5..cb00c6d 100644
--- a/src/js/main.js
+++ b/src/js/main.js
@@ -1,4 +1,5 @@
-import { override, loadAddons } from './terminal';
+import { loadAddons, override } from './terminal';
+import registerUploadFilesModal from './upload-files';
 
 override();
 
@@ -22,7 +23,13 @@ const emulator = new window.V86({
     url: import.meta.env.VITE_ROOTFS_ISO,
     async: false,
   },
+  filesystem: {
+    basefs: '/contents.json',
+    baseurl: '/flat',
+  },
   autostart: true,
+  disable_keyboard: true,
+  disable_speaker: true,
   network_relay_url: import.meta.env.VITE_NETWORK_RELAY,
 });
 
@@ -41,6 +48,7 @@ emulator.add_listener('serial0-output-byte', (byte) => {
     state.textContent = '';
 
     loadAddons(emulator.serial_adapter.term);
+    registerUploadFilesModal({ emulator });
     terminalElement.focus();
   }
 });
diff --git a/src/js/terminal.js b/src/js/terminal.js
index 5c4918a..7cd7f88 100644
--- a/src/js/terminal.js
+++ b/src/js/terminal.js
@@ -18,9 +18,6 @@ const override = () => {
           black: '#21222C',
           brightBlack: '#6272A4',
         },
-        // Tell xterm how many rows/cols (FitAddon will adjust this)
-        rows: 30,
-        cols: 80,
         allowProposedApi: true,
       };
       super({ ...defaultOptions, ...options });
@@ -66,9 +63,7 @@ const loadAddons = (terminal) => {
   terminal.loadAddon(unicode11Addon);
   terminal.loadAddon(clipboardAddon);
 
-  document.addEventListener('DOMContentLoaded', () => {
-    fitAddon.fit();
-  });
+  fitAddon.fit();
 
   // eslint-disable-next-line no-param-reassign
   terminal.unicode.activeVersion = '11';
diff --git a/src/js/upload-files.js b/src/js/upload-files.js
new file mode 100644
index 0000000..07c517f
--- /dev/null
+++ b/src/js/upload-files.js
@@ -0,0 +1,84 @@
+const registerUploadFilesModal = ({ emulator }) => {
+  const uploadButton = document.getElementById('upload-button');
+  const modalOverlay = document.getElementById('modal-overlay');
+  const modalCloseButton = document.getElementById('modal-close-button');
+  const selectFileButton = document.getElementById('select-file-button');
+  const fileInput = document.getElementById('file-input');
+  const selectedFilenameSpan = document.getElementById('selected-filename');
+
+  const openModal = () => {
+    if (modalOverlay) {
+      modalOverlay.classList.add('modal-visible');
+    }
+  };
+
+  const closeModal = () => {
+    if (modalOverlay) {
+      modalOverlay.classList.remove('modal-visible');
+      if (selectedFilenameSpan) {
+        selectedFilenameSpan.textContent = 'No file selected';
+      }
+      if (fileInput) {
+        fileInput.value = '';
+      }
+    }
+  };
+
+  if (uploadButton) {
+    uploadButton.addEventListener('click', openModal);
+  }
+
+  if (modalCloseButton) {
+    modalCloseButton.addEventListener('click', closeModal);
+  }
+  if (modalOverlay) {
+    modalOverlay.addEventListener('click', (event) => {
+      if (event.target === modalOverlay) {
+        closeModal();
+      }
+    });
+  }
+
+  document.addEventListener('keydown', (event) => {
+    if (
+      event.key === 'Escape' &&
+      modalOverlay &&
+      modalOverlay.classList.contains('modal-visible')
+    ) {
+      closeModal();
+    }
+  });
+
+  if (selectFileButton && fileInput) {
+    selectFileButton.addEventListener('click', () => {
+      fileInput.click();
+    });
+  }
+
+  if (fileInput && selectedFilenameSpan) {
+    fileInput.addEventListener('change', () => {
+      if (fileInput.files.length > 0) {
+        selectFileButton.textContent = Array.from(fileInput.files).reduce(
+          (acc, file, i) => {
+            const separator = i === 0 ? '' : ', ';
+            return `${separator}${file.name}`;
+          },
+        );
+        Array.from(fileInput.files).forEach((_file) => {
+          const reader = new FileReader();
+          const path = `/${_file.name}`;
+          reader.onload = (f) => {
+            const data = new Uint8Array(f.target.result);
+            return emulator.create_file(path, data);
+          };
+          reader.readAsArrayBuffer(_file);
+        });
+      } else {
+        selectedFilenameSpan.textContent = 'No file selected';
+      }
+      closeModal();
+    });
+  }
+};
+
+export default registerUploadFilesModal;
diff --git a/src/styles/app-modal.css b/src/styles/app-modal.css
new file mode 100644
index 0000000..ed3bf4a
--- /dev/null
+++ b/src/styles/app-modal.css
@@ -0,0 +1,112 @@
+#modal-overlay {
+  display: none;
+  position: fixed;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  background-color: rgba(0, 0, 0, 0.7);
+  z-index: 1000;
+
+  justify-content: center;
+  align-items: center;
+}
+
+#modal-overlay.modal-visible {
+  display: flex;
+}
+
+#upload-modal {
+  background-color: #3a3a3a;
+  padding: 25px 30px;
+  border-radius: 5px;
+  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
+  min-width: 350px;
+  max-width: 90%;
+  position: relative;
+  color: #eee;
+  border: 1px solid #555;
+}
+
+#modal-close-button {
+  position: absolute;
+  top: 8px;
+  right: 10px;
+  background: none;
+  border: none;
+  font-size: 24px;
+  line-height: 1;
+  color: #aaa;
+  cursor: pointer;
+  padding: 0;
+}
+
+#modal-close-button:hover {
+  color: #eee;
+}
+
+#upload-modal h3 {
+  margin-top: 0;
+  margin-bottom: 20px;
+  color: #f0f0f0;
+  text-align: center;
+  font-family: sans-serif;
+}
+
+#upload-modal .form-group {
+  margin-bottom: 15px;
+}
+
+#upload-modal label {
+  display: block;
+  margin-bottom: 5px;
+  font-size: 14px;
+  color: #ccc;
+  font-family: sans-serif;
+}
+
+#upload-modal input[type='text'] {
+  width: 100%;
+  padding: 10px;
+  background-color: #2d2d2d;
+  border: 1px solid #555;
+  color: #eee;
+  border-radius: 3px;
+  font-family: monospace;
+  font-size: 14px;
+}
+
+#upload-modal input[type='text']:focus {
+  outline: none;
+  border-color: #777;
+  box-shadow: 0 0 5px rgba(150, 150, 150, 0.2);
+}
+
+#upload-modal #select-file-button {
+  background-color: #5a5a5a;
+  border: 1px solid #777;
+  color: #eee;
+  padding: 8px 12px;
+  margin-right: 10px;
+  cursor: pointer;
+  border-radius: 3px;
+  font-size: 14px;
+  font-family: sans-serif;
+  transition: background-color 0.2s ease;
+}
+
+#upload-modal #select-file-button:hover {
+  background-color: #6a6a6a;
+}
+
+#upload-modal #selected-filename {
+  font-size: 13px;
+  color: #aaa;
+  font-family: sans-serif;
+  display: inline-block;
+  max-width: 180px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  vertical-align: middle;
+}
diff --git a/src/styles/app.css b/src/styles/app.css
index 3f5394b..0bed1e6 100644
--- a/src/styles/app.css
+++ b/src/styles/app.css
@@ -3,6 +3,7 @@
 @import 'terminal.css';
 @import 'terminal-toolbar.css';
 @import 'serial.css';
+@import 'app-modal.css';
 
 html,
 body {