This is my first post here, I hope that you guys can help. I connected my USB on my computer (Ubuntu), but I can't modify its folders/files. It says that I don't have enough permission. So I tried changing the mod with the terminal using

sudo chmod 777 /media/< USB NAME > 

but it returns that it's read only. When I put my USB on another OS it's the same! Please help! I want to be able to modify my USB contents on any OS.

Sorry, I would like to post images, but don't have enough reputation... But I can tell that mine is different than yours, it shows a warning sign, but I can see that it said that I might need two softwares: dosfstools and mtools, should I get them?

  • BTW: other USBs work fine, I am using Ubuntu 11.10. Than you. Jan 2, 2012 at 19:08

1 Answer 1


Open Gparted. Unmount your usb disk from gparted. Now repair your usb disk's partition.

[example: /dev/sdb1 not /dev/sdb. Repair partition not the disk].

enter image description here From partition menu(P) and select unmount. Again From partition menu select check. Now apply.

Reinsert your usb disk.

Follow the Instruction: [edited]

Step1: unmount your disk [sudo umount /media/usbdisk] mount it with write permission [ sudo mount -o remount,rw '/meida/usbdisk'] Now try to format the disk.[use disk utility]

Step2: [If first step does not work then follow the following steps]
Open disk utility. also insert your usb disk. Unmount the volume(m)

enter image description here

Now Delete the partition(D) enter image description here

Create a partition. Then mount it.

  • Hi Shantanu, thanks for your quick response, I understand the first part, I downloaded gparted, installed it, but when I try to unmount my device by right clicking, the unmount option wasn't enabled. Jan 2, 2012 at 19:21
  • if it is disable that means your usb is already unmounted. Select check and apply.
    – shantanu
    Jan 2, 2012 at 19:46
  • I tried to check it, but hereis what it says: An error occured while applying changes See the details for more information. IMPORTANT If you want support, you need to provide the saved details! See gparted.org/save-details.htm for more information Jan 2, 2012 at 19:58
  • can you access the file/folder of usb disk[just read]? Can you unmount your usb disk with right click?
    – shantanu
    Jan 2, 2012 at 20:04
  • Yes I can access it, I can read it, I can even add files or folders to it, But I can't delete things from it.......................... oops! Before posting this, I checked, I saw that I couldn't even open it anymore, I removed and reinserted it, and now it won't even show up... I guess that this gparted made my day worst... :( Jan 2, 2012 at 20:05

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