Since many people seems to have problems with creating the storage partition with the label, I have created an image (storage.img.gz) so you can now create it with LibreELEC USB-SD Creator.
The easiest way to install LE 8.0:
1. install the zip from recovery as usual (please note that you don't need the ext3 partition for this step!)
2. power off the device
3. create the storage partition on SD card or USB drive using storage.img.gz and LibreELEC USB-SD Creator
4. insert the storage device and power on the box
Hope this helps!