Here is a tutorial how to make Backup on decoder under a OpenESI image.
For this tutorial you need.
USB STICK format FAT32
First connect USB STICK to your receiver
Press Menu –> Setup
Select Software Management
Choose Backup Image
Choose USB or HDD with Green or Red button to start Backup
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
you can also watch this video