!!!The following method is waived since this may lead to an android nonrecognition issue.

• Install a tool:

sudo apt-get install dosfstools

• Check your disk:

sudo fsidk -l

Outpur may look like this:

pc@JK:~/Streams$ sudo fdisk -l
Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xaa649334

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sda1  *          2048 1945563135 1945561088 927.7G 83 Linux
/dev/sda2       1945565182 1953523711    7958530   3.8G  5 Extended
/dev/sda5       1945565184 1953523711    7958528   3.8G 82 Linux swap / Solaris



Disk /dev/sdb: 57.7 GiB, 61945675776 bytes, 120987648 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00007b07

Device     Boot Start       End   Sectors  Size Id Type
/dev/sdb1  *       64 120987646 120987583 57.7G  7 HPFS/NTFS/exFAT

• Begin to format

sudo mkdosfs -F 32 -I /dev/sdb1

But it may throw an error:

mkdosfs: /dev/sdb1 contains a mounted filesystem.

So have to unmount the disk:

umount /media/pc/KNIGHT
//This is where the disk is mounted

Then do again sudo mkdosfs -F 32 -I /dev/sdb1
Format is likely to finish in just seconds.

!!!The above method is waived since this may lead to an android nonrecognition issue.

A Disk Genius will do.