Unable to detect the programs or folders that occupy the hard drive space, and therefore unable to secure space for the genome assembly run

Question

I have an IBM server, which is installed with Ubuntu, of version 22.04.2 LTS (Jammy Jellyfish).

The system has two hard drives: 1. /dev/sdb2 2. /dev/sdc2. The full HDD information:

I am working on a Genome assembly project, and recently, the program got terminated due to hard drive space insufficiency. The project files are being generated in the /dev/sdc2. It looks like I need at least 1TB free space before the start of the assembly process. One solution that I have conceived of is to merge the two disks, and avail more free space.

Currently, I need solution to two problems:

In /dev/sdb2 the free space is only 68 GB, and other documents and software have only consumed 200+ gb. I don't have any clue as to what else is eating up the hard drive space. I would like to know how I can free up more space.
I would like to know if someway I can re-partition the hard drive so that I have a single drive with a 2TB capacity.

Any helpful suggestions or answers would be appreciated.

Does this answer your question? What is LVM and what is it used for? — guiverc, Aug 22 '23 at 08:19
Okay, I have just skimmed through it. looks like a risk of data loss involved, but nonetheless I will try that approach. In the meantime, I also like to know how I can free up more space. I am unable to find out the folders/ programs that occupy more than 600gb of the HDD. — Vijith Kumar V, Aug 22 '23 at 08:25
I tried mergerfs for this purpose. Can someone help me with that? I am having a hard time installing it. — Vijith Kumar V, Aug 23 '23 at 14:17

Unable to detect the programs or folders that occupy the hard drive space, and therefore unable to secure space for the genome assembly run

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