Well in that case I have done something wrong because I wasn't able to do that. I haven't updated the firmware at any point.
EDIT: Man I feel stupid now
I kind of answered my own question. Using RPI OS I just set the eeprom-update-stream from critical to stable and then updated the eeprom. LibreElec boots from a USB device.
How does it works ?
I have latest Firmware Updates and tried to write my Backup image (SD Card) to USB Stick and get the same error as you.
How can i solve this ?
You have to update the bootloader eeprom to a newer version. Easiest way to do this is to run a current RPiOS (ex Raspbnian) image from SD card, that will auto-update the bootloader to the latest version with USB boot support.
so long,
Hias
You have to update the bootloader eeprom to a newer version. Easiest way to do this is to run a current RPiOS (ex Raspbnian) image from SD card, that will auto-update the bootloader to the latest version with USB boot support.
so long,
Hias
Is that not the same like eeprom update und usb update in LE Settings ?
The eeprom update in LE settings will only update to the latest critical firmware (which doesn't support USB boot, as the version in LE 9.2.5 is now outdated).
The latest stable eeprom firmware (from July) is included in LE 9.2.5, but only for manual update, and is now outdated as well.
Either use RaspiOS or pull the Sep 03 firmware from github rpi-eeprom/firmware/critical at master · raspberrypi/rpi-eeprom · GitHub and do a manual eeprom update in LE.
so long,
Hias
Yes, correct.
so long,
Hias
Is there a documentation how to do manual Updates in LE ?
There are no separate docs for LE, just have a look at the official RPi docs linked here GitHub - raspberrypi/rpi-eeprom: Installation scripts and binaries for the closed sourced Raspberry Pi 4 EEPROMs - there's also a ton of threads about how to use rpi-eeprom-update / rpi-eeprom-config on the RPi forums (or just call these scripts without parameters and you'll get the usage info).
Only difference on LE is that you don't need to run these programs with sudo as you're already logged in as root.
BTW: probably the easiest way to get the latest eeprom / VL805 firmwares is to boot the eeprom recovery image from SD card - this'll give you the Sep 03 bootloader version as well. Either use RPi imager on your PC or the recovery image from here Release rpi-boot-eeprom-recovery-2020-09-03-vl805-000138a1 · raspberrypi/rpi-eeprom · GitHub
so long,
Hias
Thanks, now i have latest updates.
I wrote my backup image from SD card to USB 3.0 stick. Works fine.
But i dont have any internet connection with usb - sd card no problems.
Any ideas why ?
Are you using Wifi? If yes try a wired connection, badly shielded USB3 devices are known to interfere with 2.4GHz wifi usb3-frequency-interference-papers.pdf
so long,
Hias
nope, i always use wired connection wit static ip.
EDIT:
Ok, i dont know why but i erase usb stick and write the image again.
Now internet works fine 
Other question: can i expect more performance from SSD against usb 3.1?
Other question: can i expect more performance from SSD against usb 3.1?
Since when does a RPi4B have a USB3.1 port?
So, i have new USB Sticks ordered (32GB). My SD Card was also 32GB.
If i want to write the the image from SD Card system says, there are not enough sectors. (just a few)
I i continue writing it is ok but my PI says corrupt file system.
Is there any chance to get a partition smaller to get enough space? (storage has 27GB free for example)
Thanks!
Maybe to begin with a clean install? And make backup in sd card version and put the backup in kodi to fix yiur backup data back.
Not really, i dont want make a clean install.
Is there no other way ?
You can make backup and put t back on the clean install
Sorry, you dont understand my question.
I understand you. But you do not understand that an sd card of 32gb not the same size is as an 32gb usb stick.
That is the problem that you could not write the image to the usb stick.
