Automatic documentation update

Author: igorpecovnik

docs/User-Guide_Armbian-Config/System.md

@@ -172,6 +172,9 @@ __Documentation:__ [Link](https://forum.armbian.com/)
 #### Install
 
 
+Copy live OS to internal media
+
+
 <!--- header START from tools/include/markdown/STO001-header.md --->
 This section provides an option to transfer the live running Armbian system from an SD card to internal storage devices such as eMMC, SATA, NVMe, or USB drives. It prepares the target storage, copies the active system, adjusts bootloader settings, and ensures the system can boot independently without requiring reinstallation.
 
@@ -188,6 +191,75 @@ armbian-config --cmd STO001
 ~~~
 
 
+#### Download and flash
+
+
+Download and flash to internal media
+
+
+<!--- header START from tools/include/markdown/FLASH1-header.md --->
+# Flashing Armbian Images from Within the System
+### Prepare bootable media or flash internal storage using **armbian-config**
+
+Armbian includes a tool for browsing, downloading, and flashing official OS images directly to SD cards, USB drives, or internal eMMC. 
+It works on **any Armbian installation** and on **any Debian/Ubuntu-compatible Linux system**, allowing you to prepare boot media for *any supported board* from *any compatible device*.
+
+---
+
+## Features
+
+### Image Selection
+- Browse the entire official Armbian image list  
+- Filter by preinstalled applications, kernel branch, image variant, and stability  
+- Promoted images marked with ★  
+- Automatically hides non-flashable formats (e.g. qcow2)  
+- Shows image size in MB
+
+### Safe Device Handling
+To prevent accidental data loss, the tool automatically hides devices containing:
+- `/` (root filesystem)  
+- `/boot`  
+- `/boot/efi`  
+
+Only non-system block devices are selectable flash targets.
+
+---
+
+## When to Use
+
+- Installing Armbian to internal eMMC/SSD  
+- Preparing SD/USB boot media  
+- Recovering or re-flashing devices  
+- Switching OS variants or kernel branches  
+- Rapid deployment and testing scenarios  
+<!--- header STOP from tools/include/markdown/FLASH1-header.md --->
+
+__Edit:__ [footer](https://github.com/armbian/configng/edit/main/tools/include/markdown/FLASH1-footer.md) [header](https://github.com/armbian/configng/edit/main/tools/include/markdown/FLASH1-header.md)  
+__Status:__ Preview  
+__Architecture:__ <span style="background-color:#e0e0e0; color:#333333; padding:3px 6px; border-radius:4px; font-size:90%;">x86-64</span> <span style="background-color:#d3f9d8; color:#1b5e20; padding:3px 6px; border-radius:4px; font-size:90%;">arm64</span> <span style="background-color:#fff3bf; color:#7c4d00; padding:3px 6px; border-radius:4px; font-size:90%;">armhf</span>  
+__Maintainer:__ @igorpecovnik  
+__Documentation:__ [Link](https://docs.armbian.com/User-Guide_Recovery/)  
+
+~~~ custombash
+armbian-config --cmd FLASH1
+~~~
+
+
+<!--- footer START from tools/include/markdown/FLASH1-footer.md --->
+### Download and Flash Process
+
+The workflow includes:
+
+1. **Downloading the selected image** using `file_url`
+2. **On-the-fly decompression** (`.img.xz → .img`)
+3. **Progress indication** using `pv` + whiptail gauges when available
+4. **Fallback text progress** when minimal tools are installed
+5. **Writing to the selected storage device**
+6. Optional **post-flash verification** to confirm data integrity
+7. User choice to **Reboot**, **Shut down**, or **Exit**
+<!--- footer STOP from tools/include/markdown/FLASH1-footer.md --->
+
+
 #### Read Only FS