Download software - Microsoft DiskPart - from
http://www.softpedia.com/progDownload/DiskPart-Download-207653.html
1) Type "DISKPART" from the Command Prompt (accessible by clicking on
Start and then typing "cmd" into the open field); you will then see the
following prompt: DISKPART>
2) Type "LIST DISK" to see what number your USB drive is listed as.
3) Type "SELECT DISK 2" (if your USB is disk 2; replace # with your
disk #); Diskpart will confirm that "Disk 2 is now the select disk."
4) Type "SELECT PARTITION 1" (this command selects what should be the
only partition on your USB drive, the small one that you want to delete
to get back the larger, full partition size). Diskpart will confirm
with "Partition 1 is now the selected partition."
5) Type "DELETE PARTITION". This will delete the old partition. There
are no warning prompts if you have existing data - make sure you have
copied everything off before doing this!
6) Type "CREATE PARTITION PRIMARY" to create a new, full-size
partition. Diskpart will confirm with message of "Diskpart succeeded in
creating the specified partition." You can type in "LIST PARTITION" to
confirm the new, full-size.
7) Type "EXIT" to leave Diskpart. You can now format your USB drive by using the standard Windows formatting process.
- DiskPart
- List Disk
- Select Disk #
- Clean
- Create Partition Primary
- Select Partition 1
- Active
- Format fs=FAT32 quick
- Assign