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cannot change hard drive letter using WIn7 Disk management

I have a new computer and I connected my old External Hard drive (previously drive "E" on my old computer) to the usb port.

It shows up as drive "I".

I need to change the drive letter back to drive "E" so that my cloud storage backup will recognize the drive.

I went into Computer Management/Disk Management and tried to change the drive letter but when i got to the drop down box to select a letter to change the drive to...letter C thru J are not shown so I cannot select E.

How can I make E the drive letter?

this is a new computer and nothing else is connected to any of the other usb ports. I have not assigned anything with E previously on this computer.

my computer Summary is below:


Operating System
Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 4770 @ 3.40GHz 34 °C
Haswell 22nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)
Motherboard
Dell Inc. 0KWVT8 (CPU 1) 28 °C
Graphics
HP w2207 (1680x1050@59Hz)
1024MB NVIDIA GeForce GT 635 (NVIDIA) 33 °C
Storage
931GB ATA ST1000DM003-1CH1 SCSI Disk Device (SATA) 31 °C
2794GB Western Digital WD My Book 1140 USB Device (USB (SATA)) 35 °C
Optical Drives
TSSTcorp DVD+-RW SH-216DB SCSI CdRom Device
Audio
NVIDIA High Definition Audio
Operating System
Windows 7 Home Premium 64-bit SP1
Computer type: Desktop
Installation Date: 12/2/2013 4:42:21 PM
12 answers Last reply Best Answer
More about change hard drive letter win7 disk management
  1. check what's currently using the e letter. that's why it wont let you select it. you need to set the current e to something else first.
  2. E is in use by something else, you will need to change E to another letter than I to E
  3. i went into "COmputer Management" and located E:/

    not sure what is connected to it..

    here are the properties of E:

    Device Type: Portable Devices
    Manufacturer: Generic-
    Location: on UMBus Enumerator
  4. flash drive? maybe... or maybe the dvd drive? check what it looks like on the computer page. in any case it's safe to change it i guess. just give it whatever, set the current I to E then this back to I. should be easy and if anything goes wrong you just revert.
  5. how can i change drive E to something else?

    there's no way to change it from Device manager
  6. looking at the driver file details it says the driver files for this are Microsoft driver files apart of system32
  7. I went into Computer Management/Disk Management and tried to change the drive letter but when i got to the drop down box to select a letter to change the drive to...letter C thru J are not shown so I cannot select E.

    i thought you knew already. right click the whole dvd drive that has E as letter and change drive letter
  8. from device manager page , right clicking does not give me any option to change the name.

    only options avbailable are: update driver , disable, uninstall, scan for hardware changes, properties
  9. so dont go in the device manger :D go to disk management in computer management.
  10. there is no E drive in disk management.

    Only C, recovery, and I (the name of the external that i want to change to E)
  11. Open a command prompt (as administrator) and type in "diskpart" and press enter. Then type in "list volume" You should see something similar to this:
    
    DISKPART> list volume
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 0     D   Backup & Da  NTFS   Simple       931 GB  Healthy
      Volume 1     E                       DVD-ROM         0 B  No Media
      Volume 2     C                NTFS   Partition     74 GB  Healthy    System
      Volume 3     F   My Passport  NTFS   Partition    931 GB  Healthy
      Volume 4     G                NTFS   Removable   7441 MB  Healthy
    

    Do you see anything listed as E
    If you want you can copy and paste it and put it between [.code] [./code] tags (remove the period)
  12. Best answer
    Do you have any ISO or Virtual Drive type software installed. I'm not sure if it relates to your issue but I had PowerISO installed and it had reserved E: for mounting of ISO files as virtual drives.

    If it happens to be PowerISO then the instructions to change the drive letter it uses are here: http://www.poweriso.com/tutorials/change-virtual-drive-letter-assignment.htm
    Change DISK 0 to something specific other than E: or <AUTO> and then E: should become available. You can put it back to <AUTO> if you like after you have assigned the E: drive to a partition or device and it will then just pick up the next available letter.

    Such virtual drive letter assignments won't show up using DISKPART or in Computer Management.
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