Originally Posted By: tanstaafl.
I think the two drives that I want to replace are SATA drives, but I don't know how to tell for sure. Device Manager says they are: "MAXTOR S TM3320620AS SCSI Disk Device". I know for a certainty that they are not SCSI drives, but how can I tell if they are SATA?

SATA controllers can/do appear in Windows as SCSI controllers for some reason. If you're certain that its not SCSI then it'll be SATA. Mark has confirmed it anyway.

Originally Posted By: tanstaafl.
Assuming they are SATA drives, is it then just a matter of removing the old drives, plugging in the data and power cables to the new drives and copying the data from my backups? (The replacement drives will be for my D: data storage drive and E: backup drive. My C: system drive is a separate small IDE drive.)

Pretty much.