How to format a unformattable pendrive
Open RUN (Win+R) and type cmd
Then start the Disk Part utility by typing diskpart in the command prompt
To list all the disk type the command
list disk
Select the disk number that is your USB stick, In my case my pendive is disk 4
select disk 4
Remove all existing partitions by the command
clean
Now we will create a new partition,
create partition primary
Now we’ll select the newly created partition
select partition 1
Now we’ll make it active
active
Now we’ll format as FAT32
format quick fs=fat32
After the format your Pendrive is ready to USE!