Hello, Thank you for taking the time to read this message. I have recently built a system using an Asus P4C800-E Deluxe mobo. A few years ago a 20 GIG HDD was decent but now with the much larger HDD's it is concidered pretty small. I am thinking of purchasing a 160 ~ 200 GB SATA HDD. I am currently using the 20 GIG "IDE" HDD . Could one of you "Pro's" tell me: (1) If I purchase a SATA can I still use the 20 GB IDE HDD ? (2) Are there any programs out there that I can transfer all the contents of the 20 GB IDE HDD to the SATA HDD ? (3) Will I be creating a headache for myself setting up the SATA HDD ? (4) Will the SATA make a noticable difference ? Any information will be appreciated. I am new to the world of SATA. Thank you. Rick M.