Both of you, that seem to be a specific problem with your disk itself than with Solus.
Use a tool like fsck
(So for @ceritoglu, connect your drive, make sure it isn't mounted which I'm fairly certain it isn't due to the error and run sudo fsck -p /dev/sda1
)
Or, use either gnome-disk-utility
or partitionmanager
for example to repair it via an app. Both are fairly easy to use for that. Right-click on your drive partition, and click repair.