"Linux does not call your drives C, D or E. it has names like sda1 and each partition is treated like a separate drive so sda1 and sda2 are partitions on the same drive."

The drive is sda. sda1 is a partition on sda.

Outside installation and reorganisation, we don't usally spend a lot of time thinking about drives on Linux. A folder say /jon could be a folder on the same drive as the operating system, on a different drive, even on a network drive and it could be moved from one of these phyiscal locations to another without upsetting anything.

I don't know what Windows is like these days but having to have the drive letter change (eg. C:\jon getting moved to be D:\jon") at least used to be a right pain.