Firstly, type fdisk /dev/vda1 to create partition
You can type m for help, to see what option can do
Then type n for new partition
Type p for extend partition and insert the storage size
To ensure the partition is added type p to print
Moreover, type lsblk -f to check the file system
Secondly, type sudo mkfs -t ext4 /dev/vda1 to format the disk,
Type lsblk -f to check again
Then type sudo mkdir -p [mountpoint] to create mountpoint
There is no output mean successfully, and type again lsblk -f to check again