Not knowing the destination of USB in CMD

问题

I am trying to copy files from my USB drive to my PC automatically by using a batch file (.bat)

I know I can do something like that

xcopy "C:\xxxx\xxxx\xxxx.xxx" "C:\xxxx\xxx\xxxx\xxx.exe" /E /H /I

But I faced a little problem...

What if I don't know the exact letter of the drive, where the USB is inserted? How am I able to copy those files automatically? If this is possible, can someone please post a simple "xcopy" command from USB to PC.

Thanks!

回答1:

Can you add a generic file to the root of the USB drive so you can test for it to discover the drive letter of the USB drive? For instance, if you created a file called USBDrive1 in the root of the USB drive, you could do something like this:

for %%i in (D E F G H I J K L M N O P Q R S T U V W X Y Z) do if exist %%i:\USBDrive1 set USBDrive=%%i

Then you can use %USBDrive% for the drive letter in the rest of your batch file. Like this:

xcopy %USBDrive%:\*.* C:\Some\Path ...

回答2:

Place your batch file in your USB drive using this syntax:

 xcopy %~d0\folder\*.* c:\target\   /E /H /I

回答3:

This should work:

set "USBDrive="
for /F "tokens=1,2" %%a in ('wmic logicaldisk get DeviceID^,DriveType') do if %%b equ 2 set USBDrive=%%a
if not defined USBDrive (
   echo USB not connected
) else (
   echo USB on drive %USBDrive%
)

来源：https://stackoverflow.com/questions/22277180/not-knowing-the-destination-of-usb-in-cmd