Allocate Unallocated space on a flash drive…

175 pts.
Tags:
FAT
Flash drive
NTFS
Thumb Drive Formatting
I recently downloaded a Dell diagnostic tool to my flash drive. It converted it from an 8GB NTFS drive to a 2GB FAT drive with 6GB of unallocated space. I thought this was fine at the time as I planned to simply convert it back to NTFS and reallocate the memory. However, I'm unable to recover the unallocated disk space. I can convert it to NTFS again with no issues, but disk management still shows the drive as 2GB allocated (active) and 6GB unallocated space. There are no options to recover the space that I can see. The only thing I can do with the 6GB is view the properties of it; formatting the main 2GB doesn't do anything. How can I recover this unallocated space to turn my flash drive back into the 8GB drive that it should be?? Thanks, Lordhowe

Software/Hardware used:
Kingston 8GB DTI Data Traveller

Answer Wiki

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1. Download the Lexar tool and extract to your PC from following link

http://www.911cd.net/forums

2. Click on the ‘Non-Active’ radio button at the bottom of the window
3. Now click on the ‘Format’ button
4. Remove and insert back of your Flash drive
5. Go back to disc management and reformat the flash drive again and you will get the whole space again
If BootIt refuses to work do this:

Right click “computer” and click manage. Click “disk management”, then click your drive. Right click the affected partition (or whatever that empty space is) and click properties. Then go to the “tools” tab, and under “error checking” click “check now”. After it does this, reformat the drive, and you should have all of your storage back.

An easier way, for those searching… right click My Computer, Manage (or press g) left column Disk Management, right column, note the disk# of the usb flash device. Open up a command prompt, type: DISKPART <enter> type: select disk# <enter>, type: clean <enter>. Back to Computer Management, right click the usb device and format accordingly.

Discuss This Question: 36  Replies

 
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  • Lordhowe
    Unfortunately, the option to delete the partition is greyed out. I'm running as an admin on the machine as well, so I'm not sure why it won't let me do it.
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  • Labnuke99
    I had something similar happen but it was a flash drive I received from a company with a utility on it that created encrypted partitions. I wanted to use the whole flash drive also and get rid of the partition & utility. It took me quite a bit of research but I was finally able to remove the utility partition and get a full 2GB flash drive. Not sure if it will work on the 8GB model you have but I used a utility called ChipGenius that helped me through the process. The primary source for this application seems to be a Chinese website so you might consider using Google translate to read the content. This utility in combination with another utility it recommended permitted me to do a low level format of the USB key and now I have a full 2GB key. A good article about repairing/reflashing a USB flash drive process can be found here.
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  • Sonotsky
    Could one not use something like GPartEd to convert the FAT16 partition to FAT32 and grow it?
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  • Kleaner
    i was able to fix a similar problem using diskpart commands i know this is an old question here but it's one of the first results when i googled for the same problem .. so to those looking for help maybe this can also help them..... run command promt type diskpart hit enter type list disk hit enter find out number for your fdrive type select disk X hit enter (X being the number for your fdrive) type clean hit enter type create partition primary hit enter that's it
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  • Akamboj
    I also had this problem. I did something wrong with my 8gb SanDisk Flash drive and it was showing 6gb as Allocated and 2gb as unallocated. When I was doing the right click on unallocated drive it was not showing any option to allocate. After 1 hr search on the internet and downloaded so many software to fix the issue, I found the solution to get back my 8gb flash drive. Here is the solution: 1. Download the Lexar tool and extract to your PC http://www.911cd.net/forums//index.php?s=d0f1d03f809777e2be9845f96234ef69&act=attach&type=post&id=369 2. Click on the 'Non-Active' radio button at the bottom of the window 3. Now click on the 'Format' button 4. Remove and insert back of your Flash drive and you're done :o) I hope this will help you to get back your Flash drive in original capacity.
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  • Sunilkchopra
    Akamboj your fix worked for me so many thanks to you
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  • Csrobe
    Akamboj - Thanks! I had the same problem and your solution fixed it! So hard to find simple solutions sometimes! :)
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  • Brandal
    It worked for me! Thank you very much!!!
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  • Brandal
    Sunilkchopra, thank you!
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  • Redcars101
    hey man I had a problem like this one, I had an 8 GB Flash drive but I had only a couple hundred MB left, so I did this and I have my Memory back! Thanks man!
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  • Venkat88
    Thanks...a lot..very useful to me...
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  • Llclark58
    I downloaded the Lexar USB format tool but it is only giving me the option of Drive D to format and my USG Drive Letter is G. Any suggestions. I have been trying to fix this flash drive for three days already and of course I am ready to pull my hair out. Any suggestions would be greatly appreciated. Laura
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  • Sdfsdfsdfsdfasdf
    i was able to fix a similar problem using diskpart commands i know this is an old question here but it’s one of the first results when i googled for the same problem .. so to those looking for help maybe this can also help them….. run command promt type diskpart hit enter type list disk hit enter find out number for your fdrive type select disk X hit enter (X being the number for your fdrive) type clean hit enter type create partition primary hit enter that’s it THESE STEPS WORK LIKE A CHARM, FOLLOW THEM & THANK KLEANER =]
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  • Iuje9rfhe9wuhfui9rg
    thanks Kleaner Sdfsdfsdfsdfasdf that worked like a charm :-)
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  • IRobby
    Kleaner 10 pts. | DEC 2, 2009 5:43 AM (GMT) i was able to fix a similar problem using diskpart commands i know this is an old question here but it’s one of the first results when i googled for the same problem .. so to those looking for help maybe this can also help them….. run command promt type diskpart hit enter type list disk hit enter find out number for your fdrive type select disk X hit enter (X being the number for your fdrive) type clean hit enter type create partition primary hit enter that’s it THIS REALLY WORKS READ CAREFULLY AS IT SAYS TO TYPE SPECIFIC WORDS... I WAS UP AND RUNNING IN NO TIME AT ALL I HAVE A 4GB SUPER TALENT USB, A CHEAP NONAME ONE THANKS kLEANER
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  • Manrolso
    It worked just fine for me THANK YOU. My 8Gb Kingston had 6 Gigs unallocated and MyComputer/manage/diskmanager didn’t allowed to activate it.
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  • KENYA
    Thanks man! It worked. I had formatted my Transcend pen drive in a MAC and its capacity reduced from 8GB to 200MB. Can you believe that?... At first I thought it was transcend with a problem!
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  • Tkr999
    Akamboj: Thank you, My problem solved with your post. Thanks a lot!
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  • Tacoyac
    Akamboj, you are da man! Thanks so much!
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  • Tacoyac
    I should just add that although I did receive an error while running that downloaded program, and it even seemed to have crashed, it still worked and I recovered the unallocated part of my flash drive. Go figure.
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  • DevDunham
    Thank you. This worked for me on my PNY 16GB USB drive that was mis-formatted because of the Dell diagnostic utility. Be sure that you mount (assign) the usb drive a drive letter in disk management if you cannot see it with the lexar utility tool.
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  • Ssc73
    Thank YOU!! I tried about every partition manager I could find to no avail. I'm so glad I found this forum. What a great tool! I am gonna keep it in my 'must have' apps folder! Thank you Akamboi!!
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  • Steamboat1981
    Kleaner 10 pts. | DEC 2, 2009 5:43 AM (GMT) This worked perfectly for me. Thanks KLEANER I was able to fix a similar problem using diskpart commands I know this is an old question here but it’s one of the first results when I googled for the same problem, so to those looking for help maybe this can also help them….. run command promt type diskpart hit enter type list disk hit enter find out number for your fdrive type select disk X hit enter (X being the number for your fdrive) type clean hit enter type create partition primary hit enter that’s it
    10 pointsBadges:
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  • Joj
    worked well, thank you
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  • Ssh1348
    Akomboj, it's working! Thanks very much.
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  • Dariforce
    Thank you dude, it really worked with mine.
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  • Solitarywarrior
    But guys what do I do? I'm in Linux and having the same problem.
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  • DJD3X
    Thank you so much for this info. It worked like a charm!
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  • Hotpot12
    This solution is magic. It worked perfectly...it recovered my 8gig from 1gig Thank you very much!
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  • Tabrez0022003
    Thanks! I got my USB storage again.
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  • Bhen5894
    Thanks a lot! It works for my Sony 8gb. Now my flash drive is back to normal again.. haha LOL. :D
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  • eyewaves
    That's right. Answer can be approved. Procedure was correct to take my 4GB Patriot Memory USB drive back with full capacity! Thank You, Guys!
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  • Amjadbakir
    Hi man , i know it's like 3 years after you posted this but i had the same problem and i really like to post the solution i found after like 5 hours of searching , this is the solution : 
    then format your disk as fat32 and every think will work :)
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  • Amini
    thanks so much guys!
    It Helped me
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  • jayish
    Thanks Akamboj!!! It worked for me.
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  • rnahnroud
    thanks a lot my brother rocrurocru
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