I used Rescuezilla to transfer everything from my 512 LED to my 1TB OLED. It’s just clonezilla with a gui, I chose it 'cos clonezilla requires a keyboard to press clrl-c at one point and with rescuezilla you can just tap on the screen. Overall pretty easy, worked first try! Decky, emudeck, etc all working perfectly out the gate. I made sure to update the LED to 3.5 first!

I used balena etcher to make a bootable usb c drive for rescuezilla, and backed up the internal drive onto a micro SD card. It took about 90 minutes to backup and another 90 to recover.

The screen will be sideways the whole time but that didn’t matter to me, still easy

I used Rescuezila, see my comment here :)