I need to put an external storage to Ultra96, so I plugged a USB drive to Ultra96, and could see it from ‘lsblk’, however, I couldn’t mount it - always get ‘mount /dev/sda1: can’t find in /etc/fstab’. I have tried both ntfs and ext4 drives. How can I mount it?
Which command are you running?
try
mount /dev/sda1 /mnt