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I have a USB drive that I accidentally partitioned when trying to put Ubuntu on it. It's a 16 GB Kingston flash drive but it is now split to two partitions, 7.30 GB each.

How do I combine the two partitions into one? I have tried Disk Management in Windows but no luck.

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Can't test that on windows, but if you have Linux unstalled or can boot a live CD or something, you can use cfdisk, delete all partitions then create a new unique one. – Martín Canaval Jan 15 '13 at 22:22

You can do this by using diskpart on Windows:

  1. Open an elevated command prompt.
  2. Run diskpart
  3. list disk
  4. Note the disk number that corresponds to your USB drive (it should be obvious going by size)
  5. select disk X where X is the number from step 4
  6. list partition - There should be two, numbered 0 and 1, each about 7 GB
  7. select partition 0
  8. delete partition
  9. select partition 1
  10. delete partition
  11. create partition primary
  12. exit
  13. Exit Command Prompt (type exit or just close the window)
  14. In Windows, go to Computer and try to open the disk. It will ask you to format it.
  15. Format it with the default settings and give it a name if you want.

It should now a single, unified partitioned drive.

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everything works untill step 6. there is still only 1 partition listed as 7569mb. the problem might be that the second partition is not allocated to anything? – Megaeverything Jan 16 '13 at 0:01
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and i do that how? – Megaeverything Jan 16 '13 at 0:04
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The steps in my answer will do it for you. If there is only partition 0 and no partition 1, skip steps 8 and 9, but do the rest. – K.A Jan 16 '13 at 0:05
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Instead of selecting every partition one by one and then deleting, you should be able to simply use clean after selecting a disk. – Karan Jan 16 '13 at 4:58
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I had to perform four more steps to get my single partition to be recognized by Windows (after step 11) as a letter drive (The biggest is probably the "assign" step. Please note I wasn't trying to save anything on the USB drive so a full format wasn't a concern for me): 11a. select partition 1 11b. active 11c. format fs=ntfs quick 11d. assign – Chad Cook May 6 '15 at 13:03

Try MiniTool Partition Wizard or choose a program from this list.

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Just open the drive with GParted (included on Ubuntu; make sure to boot it from another device than the USB drive) and click "Create new Partition Table". Select MS-DOS and create one big FAT32 partition to fill the drive.

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