>>>>I don't know if setting up and using virtual machines is in your future plans, but if so you might want to leave some free space to create a partition dedicated to them. That can make it easier to back them up separately from the rest of your machine.
>>>
>>>I always wanted to try using virtual machines, for testing new OS, or whatever. So you bring up a good point.
>>>What I don't understand is if I will need to leave free extra space on the C: partition or create a separate partition (say G:) of about 100 GB for future virtual machine.
>>
>>A virtual machine is just one large multi-GB file (.VHD, .VHDX etc depending on which hypervisor you use) plus one or more configuration/meta files. They can be stored wherever you have enough free space. Most hypervisors default to saving on C: drive (assuming enough space available) but you can configure the files of any given VM to be stored elsewhere.
>
>Thank you for the explanation. And, btw, thank you very much for all your help on cloning my hard drive. Worked out well.

Glad you got it going. It's pretty straightforward these days unless you're doing something really exotic.