Permanently assign drive letters for USB drives

Hi,

I run a backup script to different USB drives at different times.

The backup script always needs to see the same drive letter for the USB drive (whichever USB drive is being used).

I know you can run compmgmt.msc, select Disk Management and then click 'Change drive letter and paths' to manually set a drive letter.

However, sometimes Windows remembers the drive letter that was manually set, but sometime it forgets.

Is there a way to permanently set a drive letter assignment for the USB drives?

Thanks in advance :)

One other thought, if there isn't a way to permanently set a drive letter to the USB drives, is there a registry key which can make the change (that way I can just click a .reg file to make the change....)

Thanks!

You could also check that you are using the correct USB in your script so you don't backup to the wrong one...

For example, make a small file on your USB F drive called USBF...

Code:

if exist "F:\USBF" (
    rem whatever you want to do....
) else (
    echo Drive letter is wrong.
)

Thanks very much for the replies.

lx07, that's an awesome idea which I didn't realise was possible. If the drive letter was wrong my batch script was running and completing as though it had been successful - Doh! I've now added your code to the script with a pause, so it now stops if it can't find the right file. Perfect!

Cheers

Code:

set USBDRIVE=
FOR %%D IN (C D E F G H I J K L M N O P Q R S T U V W X Y Z) DO (DIR %%D:\USB.TAG  > nul 2>&1 && (call set USBDRIVE=%%D:)
if "%USBDRIVE%"=="" echo ERROR: NO USB DRIVE FOUND & pause
echo USB IS %USBDRIVE%

Use this to search all drive letters for \USB.TAG file.