China DOS Union

This is like this. I hope to repair a colleague's SD card. The track 0 is dead and needs to be moved. I used dd under linux before and couldn't write either. (Of course)

So I thought of pctools. There is vbox on linux. I have installed DOS 7.1 before. The result was that it didn't support USB at the beginning and I deleted it (and installed pctools smoothly). Then I wanted to reinstall DOS 7.1, but it couldn't be installed!? After coming to the installation directory, it said "Cannot install MS-DOS 7.1 to the path 'c:\dos71' " I was strange. It was fine just now but not this time.

I deleted the vdi and rebuilt it, and it's still not fine. Every time I need to enter the absolute path. I entered "c:\" and it was in vain. I tried other paths and it didn't work. I don't know why.

In addition, I need to recognize the colleague's SD card with track 0 damage under DOS 7.1 in vbox (USB adapter, vbox can recognize). I have never used it under DOS before. Regarding the driver of the device,
I don't know if this works: http://www.cn-dos.net/forum/viewthread.php?tid=19232&fpage=1&highlight=usb
Dear experts, please give me some suggestions, thank you.

Er... It's already working. I was too anxious just now and forgot to set up the file system. Now it can be installed. Now it's just the driver issue of the SD card (connected to the USB port). Wish me luck... Also, dear friends, please give some suggestions hehe.