Format, and Mount a Disk on Ubuntu 20.04

To format and mount a disk on Ubuntu 20.04, follow these steps:

1. Identify the Disk: List all disks to find the one you want to format:

    sudo fdisk -l
   

2. Remove Old Partitions (Optional): If the disk has old partitions, remove them using gdisk:

    sudo gdisk /dev/sdX
   

   Replace /dev/sdX with your actual disk identifier. Use the d command to delete partitions and w to write changes.

3. Create a New Partition Table: Create a new GPT partition table:

    sudo gdisk /dev/sdX
   

   Use the n command to create a new partition and w to write changes.

4. Format the Partition: Format the new partition with the ext4 file system:

    sudo mkfs.ext4 /dev/sdX1
   

   Replace /dev/sdX1 with your actual partition identifier.

5. Create a Mount Point: Create a directory where the partition will be mounted:

    sudo mkdir /mnt/mydrive
   

6. Mount the Partition: Mount the partition to the created directory:

    sudo mount /dev/sdX1 /mnt/mydrive
   

7. Permanent Mount (Optional): To mount the partition automatically at boot, edit the /etc/fstab file:

    sudo nano /etc/fstab
   

   Add a line for your partition:

    UUID=your-partition-uuid /mnt/mydrive ext4 defaults 0 2
   

   Get the UUID with:

    sudo blkid /dev/sdX1
   

8. Apply Changes: Mount all filesystems mentioned in /etc/fstab:

    sudo mount -a
   

For more detailed instructions, you can refer to this guide and this AskUbuntu post.