Why I can't mount htis partition?

[Bob]

Hi,

I have a SSD in MBR (disk A) with two partitions: win 10 on c and data on d.
I encrypted the whole disc and all is good.
I cloned the partitions on an external hd (disk B) with minitool patition from a usb bootable key.
Now I can delete one or all partitions from disk A and restore, one or all, from disk B; all done without problem!
Booting disk A in win 10 I don't find a way to mount the partitions (the cloned) stored in disk B.
Booting from usb key in winPE, using veracrypt I can mount the partitions c and d on disk A, but nothing to do with the partitions in disk B; can't mount them.
Why???
Thanks for the time lost for reading my question