Is it possible to insert hard drives with MBR and GPT into UEFI at the same time?

Question

Hard disks

In general, I upgrade the PC, change the percentage and the motherboard. There are 2 hard drives.
The motherboard that stands now was released in 2010 and, accordingly, there is an old BIOS.
On the new motherboard, respectively, the new UEFI-BIOS.
(If you know how to make it simpler, please write.)
And I want to transfer my files without much loss by copying all the files to the 2nd hard drive.
I will transfer 1 hard drive to GPT during the installation of Windows.
Will it be possible later in UEFI-BIOS to connect another hard disk with MBR, boot normally from Windows on 1 hard disk and have access to both hard disks without problems?

It also seems like there are programs that allow you to take the disk on which the system is installed, transfer it to GPT. Does it often happen that the data on the disk gets corrupted?

Answer 1

There is no problem to use different formats.
The system will see the second disk without any problems and you can copy what you need from there.

Answer 2

GPT / MBR is just a disk layout, the disks
themselves will be seen by any system, the only problem can be that the old BIOS does not understand GPT partitioning - accordingly, it will not be able to find a bootloader on such a disk and boot the system from it, in new BIOSes, on the contrary, most often the Legasy mode disabled by default and without it enabled, the BIOS may not recognize the bootloader on the MBR.
And after forwarding the disks into the system, these are already system problems, how and what to read on them.
But GPT support seems to have appeared in 8/8.1, so the disk may not be mounted to win7 gpt