Win 11 backup image file

I have a windows image sitting on a usb HDD. I was done last month prior to doing an SSD migration. Question is;
Is there a way of accessing that backup and extracting a lost folder. I was able to do exactly that in the past when I used Norton Ghost 10. Worked great. I did a couple of full restores as tests also. I have lost a serious folder. I know I could restore to a spare 1T Hdd (temp remove the SSD) but a bit time consuming .

Looks complicated but will give it a go. Thanks.

So, I got this far and ended up with Disk 4 and Disk 5 plus the vhdx file on my desktop. What I feel I need to do is somehow remove those two disks and try again. The image file is sitting on a USB drive plugged in.

mount it read/write

Problem might be moot anyway; but will figure it out later. My image backup file was squirreled away on a WD 2T passport. Plugged it in to the desktop, heard the startup tones then nothing. Win not seeing the drive. Plugged it into my laptop and same thing. Having rotten luck today. A tech friend thought it might be soldering connections on the board; Opened the drive with little problem but I need a new set of torque driver bits to get the board off. They will arrive from Amazon tomorrow. Don't think I will be able to get the files off otherwise.