Here follow these instructions :
Start administrator’s command prompt:
- Open start menu
- Press Ctrl+Shift+Enter
Fire up the utility called
diskpart. Literally, enter DISKPART command.
DISKPART> prompt should appear.
Now in diskpart prompt type:
LIST DISK and it will list all your Disks including your USB drive. Note the Disk number.
SELECT DISK <num>, where
<num> is your USB disk number. Just look for right capacity of the drive.
List all partitions on it:
For every one of them type:
SELECT PARTITION <num>, where
<num> is the number of partition and
Now check there aren’t any of partitions left:
LIST PARTITION. If there aren’t any create one partition:
CREATE PARTITION PRIMARY – If it asks about size, just use the default value – it is the max capacity
FORMAT FS=FAT32 QUICK – I think USB flash drives use FAT32 filesystem by default. You could use NTFS instead too.
I have attached the screenshots below: