I wanted to know if we can change an os without removing the sd card. I basically have Gamepi20 and it is all locked up. there is no way to remove or add an sd card. I Don't have any mini cross wrench sleeves lying around, so unscrewing is not an option. I run a custom Retropie version which can be found below.
Retropie image: https://1drv.ms/u/s!At1XVmt1PVrlgSuwxNF-H3g1jsKg?e=Q01Ghv
Gamepi20 details: https://www.waveshare.com/wiki/GamePi20