Thank you for your help, I need the sattelite Star One C2 C4 and I couldn't find on that thread, I'll try to explain better what is going on.
I found a complete list of the file Satellitesxml on engrense, so I put the file in etc tuxbox, replace the original one, this folder etc tuxbox is inside the file rootfs, so I used Powerarchiver2015 to do that.
When I insert the flashdrive in the Solo4k the file rootfs is compressed, is that correct? I tried to uncompress the file but it didn't work, the device coundn't read anything.
Ok, after that I put the flashdrive in the USB, turn on the VU+Solo4k (yes it is the original one) and follow the steps, the device reads the flashdrive and starts doing the update, the the device reboot itself, after the reboot the device stucks and doesn't start anymore, so then, I have to do the same steps with the original archives that I downloaded from the VU+ and then it works, but with a satellite that I don't need.
I tried a different thing, I edited the original file Satellitesxml and insert only the information from the satellite Star One C2 C4, did the same steps and after reboot the device stucks again.
I don't know if I'm doing something wrong or if I have to do something else.
Any help is welcome, thank you.