Restore selected files from image backup

Hi there,
I am trying for hours to find relevant info in the forum but no luck. So I will ask here directly.
I did an image backup of my 3 drives from my laptop (Win10) to my qnap nas. Few days ago I got the ransomware virus and I had to setup my laptop from the beginning upgrading all my software to the latest versions.
Now I am trying to get the files I need from these image backups but it seems impossible. I can see backup files in the web interface of the server but under the old name of my laptop.
Can somebody explain how to do this?
server version 2.4.13 and client 2.4.11


If you can see the image files on your computer, you should be able to “mount” the image/s as a new drive (per image, obvs) to your recovered computer…once mounted, you should be able to navigate the folder structure to pull the data back out…

Please bear in mind that most of us on here do this in our own time, and get no reward (other than the feeling of helpfulness) in trying to assist you or anyone else; as such, we have no SLA to adhere to, nor any need to answer…

In this particular instance, I happen to have seen it and was able to have some input, so have added the comments above - but equally, could have decided not to add anything…

@OnlyMe Many thanks for your answer
I know that it´s up to you to answer to my question but I think this is the meaning of the forums.
To share the knowledge and the experience with people in need.

Indeed, the general “meaning” of a tech site’s forum is to share knowledge/tips/tricks/issues and sometimes chat…but my point was more about the SLA aspect, someone is likely to respond and (at least try to) be helpful, but it could be a few minutes or maybe even a few weeks - just depends on when a person happens to see it or is in a position to help…

Have you been able to mount the image/s or get the data back…?

Hi. I managed to get my files from the drive C but unfortunately I cannot mount my data disk (drive D). The size is 655GB and the uncompressing process took over night. I am not sure what happened during the night because I did not find the window open showing that the process has finished. Probably my laptop restarted.
Now when uncompressing I get the below error
2021-07-19 15:52:17: ERROR: Footer checksum wrong. Switching to header
2021-07-19 15:52:17: ERROR: Header and footer checksum wrong
2021-07-19 15:52:17: ERROR: Magic in header not found for compressed file
2021-07-19 15:52:17: WARNING: File is not compressed. No need to decompress.
Press any key to continue . . .

and if I try to mount the file it says that the file or directory is corrupted or unreadable.

Is there any way to fix it?