rapid storage tech option

Just built a comp for my grandson. OS is win 7 home premium 64bit. Used a Samsung 500G SSD. for the OS. installed the SSD all by itself, and installed the OS. Then installed a WD 1 TB for additional space. when I went to check the install I found that the rapid storage was turned on. The SSD was the C drive and the HDD was the secondary to the SSD. I have no idea how this happened? I am aware that I can just turn off the RST, but not sure what is going to happen. I sure could use some good advice! I was thinking that I should disconnect the HDD, Then turn off the RST then reinstall the HDD? I sure someone can tell me the best way to go. Thank you, I always come here when I have a problem. I have never been disapointed Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz, Intel64 Family 6 Model 60 Stepping 3
Processor Count: 8
RAM: 8130 Mb
Graphics Card: AMD Radeon R7 200 Series, -2048 Mb
Hard Drives: C: Total - 476937 MB, Free - 422870 MB;
Motherboard: ASUSTeK COMPUTER INC., Z87-DELUXE
Antivirus: AVG AntiVirus 2014, Updated and Enabled