Add emmc backup

.gitignore

@@ -1,3 +1,4 @@
 update/*.swu
 FW/*.bin
+FW/*.swu
 unpacked/*

README.md

@@ -34,6 +34,49 @@ Default password for the firmware is `toor` but it can be changed in the `shadow
 
 **update** - Contains the packed firmware files.
 
+![photo_2024-02-05_02-46-45](https://github.com/ultimateshadsform/Anycubic-Kobra-2-Series-Tools/assets/151234273/be75b895-d655-440e-92d7-b9804da16f05)
+
+<details>
+  <summary>EMMC BACKUP</summary>
+
+EMMC Backup Procedure
+
+1. Use app version 2.39 and stop the booting process by holding key 's'
+2. Insert USB disk with the file backup.scr on it
+3. From the uboot shell enter the following:
+
+usb reset
+usb dev 0
+fatload usb 0:0 42000000 backup.scr
+source 42000000
+
+4. Remove the USB disk and insert at least 8GB USB disk
+5. Wait about 15 minutes and the entire emmc will be transfered 1:1 to the USB disk
+   If you see an error and the script stopped before showing 100%, insert another type USB disk and enter:
+
+source 42000000
+
+6. From a linux machine export the backup as a file:
+
+dd if=/dev/sdh of=emmc_backup.bin bs=512 count=15269888 status=progress
+
+---
+
+With the xfel tool:
+
+1. Enter the printer in FEL mode
+2. Enter the following:
+
+xfel ddr t113-s3
+xfel write 0x43000000 uboot239.bin
+xfel exec 0x43000b50
+
+Press and hold key 's' until the boot process stop in uboot shell and go to step 3 above
+
+You can modify the script and create new backup.scr image by: mkimage -T script -n 'EMMC Backup' -d backup.txt backup.scr
+
+</details>
+
 <details>
 <summary>Old info</summary>
 </br>