I have just now created the partition from the entire external - running chkdsk again.

Then I will run chkdsk on my SSD.

Then I will try to make another image with Macrium.

Then... the shop?...

Wow I'm impressed with the pace of the replies.

I wasn't the one to clone the disk, the shop was. I also ran chkdsk on my SSD - no errors found.

Yes, old Vaio with Win 7 x64 is the one I'm...

So how else can I make Macrium work so that it backups the image to the disk.

It runs with errors.

This procedure has been performed.
No errors found.

Run it again? On W 7 or W10?

According to this article it ain't that easy to use:
Windows Drive Fitness Test v0.95 Review (Free HD Test)

How should I perform it?

Sounds reasonable mate

You mean this?
https://www.hgst.com/sites/default/files/downloads/WinDFT095.z i p

You are right, I just don't get it. It used to be so simple under W7 on MR 4.2 with linux bootable disk.

I have spent some time reading tutorials. I have also tried AOMEI Backupper Standard 3.2 to...

Is there any other way of achieving what we have in mind? Or better yet - stopping it from collecting the data of Usage?

I think...I have done my homework, meaning I
I followed the suggestions of:
How To Backup Windows 10 The Safe Way With Macrium Reflect Everyday Linux User
How to Create an Image of Your PC...