This is a bit of a rare scenario (I believe) so I haven't found much info about it.
Here's my situation, I'm running a Windows 7 Pro PC with a 120gb SSD (C: ), 1TB HDD (D: ) and other external mass data HDD's
I'm getting a new 1TB SSD for Christmas, but I can't have it until the 25th. However, in the mean time, I have a 1TB SSD that I borrowed from work as well as a USB 3.0 to Sata adapter.
Ideally, I'd like to keep my current computer and 120gb SSD running until Christmas. In the mean time, while waiting to actually GET my new 1TB SSD for Christmas, I would like to install a clean copy of Windows 7 on the borrowed 1tb drive (connected via USB 3.0 adapter), and get the new OS all set up with drivers, programs, etc. While maintaining the ability to boot up to my installed 120gb OS in case I need to use my computer.
Then, once I receive my new 1TB SSD for Christmas, I can just install it in place of my 120gb SSD, boot to the 1TB borrowed drive connected usb 3.0, and image the drive (already set up) over to the installed 1TB drive.
Then I can simply disconnect the USB Borrowed drive so I can return it to work after the break, and re-format my 120gb ssd to be a Steam game install drive only. (Using steam mover)
I know it's a very convoluted process, but I'd really like to use the time now, before Christmas, to get my clean install all set up, because after Christmas i'm going to be fairly busy and may not have time to do the clean install.
Is this even possible? How would you recommend I go about doing it? Any better ideas?
The one saving grace I have is that everything besides the OS SSD would be the same, so every drive would be running on the same system potentially allowing all the configurations to work correctly.
If the above wall-of-text was too hard to understand I'll try to break it down in the steps below
1. Attach borrowed SSD to running PC, via usb adapter
2. Boot to borrowed USB SSD and install clean OS
3. Set up clean OS on borrowed USB SSD
4. Replace installed SSD with new 1TB SSD.
5. Boot to borrowed USB SSD and image it to the new 1TB SSD.
6. Boot to new 1TB SSD, disconnect Borrowed USB SSD, and set up old small SSD as secondary steam game drive.
Thanks for reading and hope you can help!