The problem seems to be the one that this article addresses:
https://www.easeus.com/resource/raw-...e-recovery.htm
I was able to make an image copy of the partition contents, the folders are the following:
.adobe-digital-editions
.kobo
.kobo-images
Inside there are 31 files and 57 folders (19 MB in total)
Then i formatted the patition with FAT32 and last I unpack the image files and folders back to the partition.
When I disconnect the USB cable the kobo started the initialization process again.
Is there any files or folders missing in the image file or simply it's not possible to copy the folders just as i did ?
Maybe i should copy using other method ?