Suggestion: swissbit sd cards https://www.swissbit.com/products/nand-flash-products/microsd-memory-cards/ https://www.swissbit.com/products/nand-flash-products/

Suggestion: swissbit sd cards https://www.swissbit.com/products/nand-flash-products/microsd-memory-cards/ https://www.swissbit.com/products/nand-flash-products/micros... I live in Norway and can recommend digikey or mouser for sensible price and shipping cost. Both suppliers are exceptionally professional, minimum order quantities of 1. https://www.digikey.com/ https://www.digikey.com/ https://mouser.com/ https://mouser.com/ I have experience with swissbit products, but not the sd cards. Edit: A different trick is to run the bootloader on the sd card as usual, but the OS itself can be elsewhere, usb hdd, maybe network share.