Robert in CA wrote:
I connected my external HD and here are the Mrimgs:

https://postimg.cc/R3XyBGz1

I found a 780 System repair disc and a 780 Rescue disk
which one should I use? Do I have to open up Macrium to
use them?

Thanks,
Robert

I see MRIMG files of various sizes there.

When you make backups, you could be putting comments
in the file name, such a "kbd" for the backspace-key
issue and so on. By noting the pattern of which
failures occur ("mouse_jumpy") that gives you some
minor criterion to judge the backups.

Since the main purpose of the OS you will be putting
on new disks, is as emergency boot provision, it
doesn't really matter whether your Downloads folder
is complete as such. You only use the emergency backup
OS long enough to achieve a desired result, rather than
necessarily "living there".

If the main drive fails to boot some day, then you could
"move control" to your backup drive and its operational OS.
But that would also require moving your email profile from
the old machine, moving the most recent bookmarks file, the
contents of the Downloads folder, or whatever.

So when I look at the MRIMG files on offer, my main concern
is not dragging malware onto the new disk. Some image there
has to be "clean enough, to be cloned".

Macrium_CD == DVD tray Optiplex780 == the backup drive on USB
which is providing the
== New HDD on SATA, inside source MRIMG

You have to restore a C: and a System Reserved, for the new
disk to boot. If the Macrium CD is reasonably new, it may
even have the "Power Off" option in the shutdown menu.
Handy for rearranging stuff for the "first boot" of the
new HDD.

When you're using the Macrium CD, it'll be the Restore menu,
then browsing to the external USB to find that "best" MRIMG.

Paul