https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2017/11/18/howto-open-older-pi-sd-card-via-usb-multi-reader-on-raspberry-pi.aspxAfter doing sudo apt-get update sudo apt-get upgrade on an older Raspbian installation (at a 4GB SD Card), some corruption occured (probably due to lack of space, since I see newer NOOBS asks for an 8GB SD Card), making it unbootable. Would only showelCommunityServer 2.1 SP3 (Build: 20423.1)