Solution to E: can’t mount /sd card ClockworkMod (CWM) Error

Few days ago, a friend of mine asked me to flash his Android phone (Galaxy Ace) to a customized kernel like Cyanogenmod since his phone lagging like hell. ClockworkMod was already installed on that phone (version 5.0.2.6), so just need to find a suitable Cyanogenmod ROM for Galaxy Ace and Flash. I’ve downloaded CM 7.2 KANG-signed ROM release from Xda-developers.

I copied the the ROM file into SD card, backed up important stuff like contacts then switched off the phone, then boot into CWM recovery mode(By pressing Home+Power button and then release the power button). I chased the normal procedure – wiped off data and cache partition. The real issue starts from here: I headed into Install Zip from sdcard … Shockingly there was no files on SD card. I’ve tried to mount the sd card from Advanced option but no luck. It displays “E: can’t mount /sd card”.

I searched internet about this problem, fortunately after a few clicks I’ve found the solution!.

The problem was there because the SD card has fie system NTFS. Some older versions of CWM or TWRP have issues reading NTFS and exFAT cards. So I had 3 options

  1. Upgrade into a newest ClockworkMod version.
  2. Switch to the latest TWRP recovery
  3. Format SD card using FAT32 file system.

I did’nt tried the first two options rather I quick formated the SD card into FAT32. Copied the Cyanogenmod ROM file again. Yes, this time worked with no problems.  I’ve flashed the phone and it has now running smooth cyanogenmod 7.2. If you guys ever come across this problem, I recommend you to try the third option first since its easy to format a memory card than upgrading the CWM/TWRP.

About Tomin

I'm Tomin, a part time blogger from India, a student here the admin of Technicles. I started my blogging career 3 years ago and like to share technology information among people.

10 Responses to “Solution to E: can’t mount /sd card ClockworkMod (CWM) Error”

  1. Rishik says:

    Thanks, dude. That helped a lot.

  2. Zuss says:

    And what are the prons & cons of formatting the internal SDcard to Fat32?

    • Tomin says:

      @Zuss,
      Pros of FAT32 file system are:

      - It is readable by both linux and windows systems

      Cons:

      - FAT32 can only hold files of 4gb or less in size
      - High amount of fragmentation on large memories.

      • chris says:

        Hi im from india too my problem is i go to cwm and go to backup and restore then i click backyp and it says cant mount sd card what should iil do i want to update my galaxy pocket to jelly bean 2.1.1 and ths is my problem help

  3. Sean says:

    I’ve format the internal sd card, and it’s exactly the same. Please could you help me?

  4. jazzyone says:

    Hallo, my problem, sdcard unable to mount, in cwm and also twrp, my device is htc desire vc t328D,

  5. jp says:

    hi… i tried that procedure that you do.. i format it in a PC(winXP) i selected Quick format and try to go to CWM recovery.. bit when i select the apply update from sdcard, it says that e:/ cant mount blah blah o error mounting… in my case i can’t flash/backup/restore…

    my cwm version is 5.4.4 and my OS is ICS

    hope you can help me with it.. just feel free to email me

  6. SOLUTION:
    1. Get the latest boot.img from a NIGHTY .zip file (to get the latest CWM recovery)
    2. load it to your phone with fastboot
    3. boot into your new CWM recovery
    4. Choose ADB sideload to transfer the .zip from the PC via USB!!!
    5. follow these instructions: http://teamw.in/ADBSideload

  7. keval says:

    hi ..
    as you say format memory card in fat32 , than after it will give me same error so now what can i do

  8. Loren says:

    For Nexus 5, you need to go to wipe cache partition (if you are seeing errors) and
    mounts and storage -> format /data and /data/media (/sdcard)

    Obviously, this removes part of the point of the backup since you’ve now erased the data, but you can still back up your ROM…

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