The drive with the OS is by definition the c:-drive. Nothing is wrong with that. But it's somewhat strange that the reset chooses to install Windows on the HDD, not on the SSD.
It now seems a question for Lenovo Customer Support. After all, they made the reset you used.
I have a Y50-70 touch with an Nvidia Geforce 960m(2gb) and i7-4720HQ. I have had this laptop for around a year now and the only problem that I have really had is that my Razer Naga eventually quit being recognized but would still glow and the number pad on the side of the mouse would work, but nothing else. This being a problem, I did a system reset last night and things have gone from bad to worse.
Now that I have done the system reset, the OS is now located on the C:\ Drive which is my HDD and not my SSD. I have a C:\ and D:\ Drive, before the reset the D:\ drive had multiple files in it (which I did not pay attention to the specifics).
The laptop is now running slow and clunky, the startup takes way longer, WoW which was running 1080p ultra graphics at 60fps... now it's running wow 720p, low settings, windowed mode and freezing up every few seconds...
I could use some help. I have looked into doing another reset but it has no option of choosing the D:\ drive instead of C:\ drive, and it says target destination C:\ drive. I would be interested in moving the files without having to do the system reset on my SSD for time's sake.
Thanks in advance, if you need any other info comment it and I'll be more than happy to answer.

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