Originally Posted by knj691
Yes. Thanks for the reply. I can access them by connecting to my PC, but if I open them it reads them on the PC not the Kindle.
You don't seem to have understood the reply you got.
When you connect your Kindle to your PC it appears as an external disk drive. On that external disk drive there is a folder "documents". When copying .mobi format ebooks to your kindle, they must be copied into that folder, and nowhere else. If you copy them there, they should show up on your Kindle's list of ebooks once disconnected from your PC.