The device model is Samsung Galaxy Note 8.0 (gt n5100) It's not booted yet had developer mode activated.
The flash memory is completely broken (which probably means the bootloader is gone as well?), and since a simple repair at a shop would cost more than 150 USD, I've decided to give it a last try by copying an Android system onto the SD card to make the device at least function again.
I think I will kind of figure out the last step by myself since I'm on Linux all the time, but I'm not quite sure how to change the boot order or whether it is possible at all.
Is it possible to create a "bootable SD card" to boot Android from on this device – and if so, how is this done?