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I have written a image on the usb by the win32diskimager,before I press write it said that writing to a physical drive may curropt the drive,i thought it may also not corrupt so i pressed write,after finishing my work with the usb,i format it but after formating the usb properties says 'usedspace-0 bytes freespace-256mb',how can a 2 gb flash drive change into 256 mb flash drive.?please help me how can i fix it ?is there any way to make it as like as before again ?

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migrated from Dec 21 '10 at 9:19

This question came from our site for professional and enthusiast programmers.

closed as not a real question by studiohack Feb 2 '12 at 19:57

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Maybe someone sold you the wrong thing? – Klaus Byskov Pedersen Dec 21 '10 at 9:18

Use a low level format tool to format the USB disk, here is one that might be useful.

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Thanks it works for me. – Rosdi Mar 19 '14 at 7:07

Either use a low level formatter utility as suggested by @cartman or else boot a Linux system and reformat the flash drive.

The problem you are experiencing is that somehow what you did changed the partitioning and/or the format of the drive. Microsoft has a bad habit of being very self centered in the formats they recognize. If the drive got repartitioned and or formatted in some strange way that is a non Microsoft supported way, Windows really can't see the extra space. Linux is much more forgiving - it will be able to see the rest of the drive even if it can't tell what the actual partition/format is. Under Linux you should be able to repartion/and or reformat it. A low level format utility - see if your particular drive manufacturer has one on their website - bypasses all of that and goes down to the hardware level and redoes everything in some default format - usually entire drive, FAT32 for compatibility.

Obviously, remember to backup whatever you have on the flash drive because either of these methods is destructive.

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