wrong fs type
(edited)wrong fs type, bad option, bad superblock on /dev/sdb2, missing codepage or helper program, or other error.
fsck
your drive (edited)e2fsck
then maybe?
https://man.archlinux.org/man/e2fsck.8.enits metadata is inconsistent and using it in read write mode
chkdsk
is recommended to repair (edited)