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I tried installing some Chrome OS on my 4 GB flashdrive and it got formatted and whatnot. Now I formatted it once more with Windows and it is now 1 GB and no longer 4 GB.

I read somewhere that I could use partition wizard or something like that? Didn't finish reading because it got all complex.

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migrated from Apr 11 '13 at 5:51

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

PS: 4 gb is 512 MB. – Hennes Apr 11 '13 at 5:57
@Hennes - WHAT? – Ramhound Apr 11 '13 at 11:42
4 gigabit is 1/2 gigaByte is 512 MB – Hennes Apr 11 '13 at 11:45
up vote 2 down vote accepted

Go to Disk Management

Delete the 1GB Volume on the flash disk

Create a new Volume at the full 4GB

Take a look here for more details on what to do. It's for XP, but shouldn't matter if you're on 7 or above either:

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thanks, this worked! Another way i found during my research was to use EaseUS Partition Master :) – SkyWalker68 May 2 '13 at 8:49

It sounds as if your flashdrive has the wrong values in its partitioning scheme. This is easy to fix without extra software.

First copy all data you want to keep (the next steps will erase all on the drive).

Go to start, run and type diskpart.
In diskpart select disk 1 (Make sure that you have the right disk here, the number can differ) then issue a clean command to wipe all old information.

The next time you insert the drive you will be asked if you want to initialise it (as a 4GB) disk.

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