I'm new to Ubuntu. I've allocated 110 GB to my root partition and I have 315 GB unallocated space and I'm trying to extend my root partition to include the excess 315 GB. I have searched for other methods but i can't understand the process because I have missing partitions like linux-swap and the extend partition.
And also i tried unlocking my ext4 partition but it said
currently in use disk is busy
How can I extend my root partition to use the unallocated space to its left?