Cross posting not allowed

where is the SD?:
Filesystem 1K-blocks Used Available Use% Mounted on
udev 3868852 0 3868852 0% /dev
tmpfs 776700 9604 767096 2% /run
/dev/sdb1 33542144 1521664 32020480 5% /cdrom
/dev/loop0 1425792 1425792 0 100% /rofs
/cow 3883480 98624 3784856 3% /
tmpfs 3883480 444 3883036 1% /dev/shm
tmpfs 5120 4 5116 1% /run/lock
tmpfs 3883480 0 3883480 0% /sys/fs/cgroup
tmpfs 3883480 336 3883144 1% /tmp
tmpfs 776700 88 776612 1% /run/user/999