Here is a tutorial how to make Backup on Vu+ decoder under a OpenESI image.
For this tutorial you need.
Material:
Vu + ZERO, UNO, DUO, DUO 2, ULTIMO, SOLO, SOLO 2, SOLO SE, zero 4K, Uno 4k, solo 4k, Ultimo 4k
USB STICK format FAT32
First connect USB STICK to your VuPLUS
Press MENU BUTTON, select Setup
Select Software management
Select Backup Image
Press GREEN BUTTON to select USB
This operation will take 5 to 10 Minutes
Warning : Don’t remove USB stick or turn OFF your receiver during this operation
When this operation finish exit, and remove your USB STICK.
Connect your USB STICK to you PC, you can archive your backup now in your pc or in the cloud