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#11
I understood that the SSD + hard drive enclosure are already working. If they are, the drive is already initialized (MBR or GPT) and formatted as NTFS.
If you can't see the drive under Explorer, the drive isn't initialized. Open Disk Manager (C:\Windows\System32\diskmgmt.msc), select the drive and initialize it as MBR or GPT (I suggest to initialize it as GPT). It will also format the drive.
To just format a drive, open Explorer, right click on the drive and select Format.