# Delete u2f files from rpi0

**URL:** <https://forum.makecode.com/t/delete-u2f-files-from-rpi0/34713>\
**Category:** Help\
**Created:** [March 19, 2025, 5:19pm UTC](https://forum.makecode.com/t/delete-u2f-files-from-rpi0/34713 "2025-03-19T17:19:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sofiania](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/sofiania/32/21889_2.png) [@sofiania](https://forum.makecode.com/u/sofiania)\
**Post date:** [March 19, 2025, 5:19pm UTC](https://forum.makecode.com/t/delete-u2f-files-from-rpi0/34713/1 "2025-03-19T17:19:36Z")

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Hi, I have a homemade arcade with makecode arcade on a raspberry pi zero and my students have made so many projects, so the sd card is now full. How do I easiest clear up some space? The dragged and dropped u2f files are not accessible from a windows computer with usb. So I can’t delete files the same way I drag and drop them in the first place. The only u2f files showing are the 5 examples from the installation.

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<div class="post-metadata">

**Author:** ![a012](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/a012/32/24099_2.png) [@a012](https://forum.makecode.com/u/a012)\
**Post date:** [August 25, 2025, 6:32pm UTC](https://forum.makecode.com/t/delete-u2f-files-from-rpi0/34713/2 "2025-08-25T18:32:32Z")

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### **roblem**

- SD card is full.
- Projects were dragged in as `.u2f` files.
- On Windows via USB, you can only see the **example files** , not your students’ projects.

This happens because the Pi is likely using **Linux file permissions** or a filesystem that Windows can’t fully read (like ext4). The projects exist on the card, but Windows can’t see them — that’s why dragging and dropping shows nothing.

* * *

### **Solutions**

#### **Option 1: Delete directly on the Raspberry Pi**

1. Plug in a keyboard and monitor to the Pi Zero.
2. Open the **File Manager** (or terminal if you’re comfy).
3. Navigate to the folder where MakeCode stores `.u2f` projects — usually something like `/home/pi/makecode/`.
4. Delete old projects to free up space.

#### **Option 2: Use SSH or SFTP**

1. Enable SSH on the Pi.
2. Use a program like **WinSCP** (Windows) to connect to the Pi over the network.
3. Browse the Pi’s file system and delete unwanted projects.

#### **Option 3: Backup + Reformat**

1. If it’s easier, backup the entire SD card to another drive.
2. Reformat the SD card to FAT32 (so Windows can fully read/write).
3. Copy back only the projects you need.

* * *

💡 **Extra Tip:**  
If you have tons of projects, you can create a “student project archive” folder on another drive and move old `.u2f` files there before deleting from the SD card. Keeps things organized and avoids losing work.

* * *

Basically, Windows can’t see the files because of Linux filesystem quirks. You need to **delete them from the Pi itself** , either directly or over the network.