A friend had trouble with her Win 7 computer. I couldn't get it to go so she took it to a store and they upgraded to Win 10 Home. It all went fine but it boots and programs run very slowly. I went to take a look at it. (She has to have it handy because of her ongoing photography business.) I am curious about her hdd set up. I know she has a SSD drive. And she has a 1 tb HDD. The C drive is listed as 200 gb and has Win listed in directory. Then there are 2 other drives. The B is 250 gb and has Win listed in its dir, and the J is listed as 750 gb. Where would the system files be kept? And then the 1 tb HDD is split into 2 partitions? Thanks. I've never dealt with 2 internal hard drives before.