When running e2fsck -y /dev/sdc1, I'm receiving the error:

e2fsck: Filesystem has unsupported feature(s) while trying to open /dev/sdb1


In my case, the file system of the external USB drive was ext4, reformatting it to ext3 eliminate the issue.

To view the current file system, do the following:

  • Mount the device
    mount /dev/sdc1 /media/usbdisk
  • Issue the command
    df -T

To re-format the partition to ext3 without needing to re-partition:

mkfs.ext3 -L MyLabel /dev/sdc1