Something wrong here?

There is no official LE 10 for RPi 3B yet. So you probably downloaded the wrong image.

Nightly builds are pretty stable on RPi 3B, get one here.

Which build did you download? We don't provide official LE10 builds for RPi0-3, only RPi4.

so long,

Hias

The "RPi4" in the filename should give you a hint why it doesn't work on an RPi3

Either use the LE9.2 RPi2 build or the latest RPi2 nightly build (beware: this is experimental LE11 stuff) from https://test.libreelec.tv/ (RPi2 builds will work on RPi3, too).

so long,

Hias

Quote from Reddirt

It seems odd because I can boot an older version previously installed on another usb stick no problem.

Well, in any case, the RPi3 and RPi4 are totally different beasts, their installation images will not work on their opposite sides.

If you still want to run a nightly on the RPi3, note that H265/HEVC support is broken, and likely indefinitely.

Quote from Reddirt

I decided it's time for a shiny new RPi4 so that's my next project and I understand. I'm still stuck on the sd-usb creator issue. I've prepared two different usb sticks of different brands and sizes and neither will boot up on my Windows PC. I have a few other usb sticks with LE9.2 on them which still boot up just fine. What would cause this?

maybe a test with an window install image to exclude it's the usb stick itself:

on windows:

open a terminal with admin rights and key in the following commands (all after "#" are comments not commands !) :

diskpart

list disk

select disk N # adjust "N"

detail disk # to see you selected the correct disk

clean # cause this will move your data to /dev/null

create partition primary

format fs=ntfs quick

assign

active

exit

now unzip [1] or mount under linux a windows install dvd and copy the content to the stick

does the stick boot (now) ?

no: [2]

[1]

don't known if the windows buildin zipper is that smart.

if not:

Download

[2]

H2testw

H2testw erkennt gefälschte USB-Sticks, indem es deren tatsächliche Speicherkapazität ermittelt. Auch andere Wechselmedien sowie Festplatten lassen sich testen.

www.heise.de

from the included readme (please read at first !) :

"... H2testw was developed to test USB sticks for various kinds of errors. ..."

Quote from Reddirt

I would have tried the H2testw but my German is limited to Please and thank you.

well, "german" "download" is the same as the english "download"

the file downloaded and unzipped provides an (english) readme !

other way:

*long* format the stick under windows and "chdsk /F ..." (see: chkdsk /?)

dumb question:

you tried the windows install usb stick on a windows box ?

hint:

with an the windows installer stick, even with elder GPU's, it needs some time until the setup/install window appears (seen with elder Intel GPU, HD4000, Ivy Bridge)

time to shovel ~4GB (win10) from an slow (?) usb stick into RAM !

Quote from Reddirt

So....I fired up my Linux Mint machine but couldn't download the gz file

md5 checksum to compare:

da23178c4b1d9700842d7df9386e95e6 LibreELEC-RPi2.arm-11.0-nightly-20211127-b9d3fa5.img.gz

it's the last but one file in the list from comment #5

and for the LE usb creator:

3e094fac708fa3008864260e820ba1c7 LibreELEC.USB-SD.Creator.Linux-64bit.bin

Reddirt I think you misunderstood the process. Tools like USB-SD Creator or Etcher are programs who run natively on your OS (Windows or Linux). They write the LE image (in your case RPi2 img.gz) to a USB port, where you have to attach a USB-to-microSD adapter. I'm using a USB-to-SD adapter, and the SD card is an SD-to-microSD adapter. So the goal is to write to microSD, not creating a bootable USB stick.

I still don't get it. Why do you need a "bootable USB", if USB-SD Creator and Etcher run natively on your OS (Windows / Linux)? The only bootable result should be the microSD card.

We also have a Wiki entry.

No problem. That's why we are here.