Yes; hard drives store permanent data (data which needs to be retained even while the computer is switched off), this accounts for most data. Almost all files you will interact with on a standard home computer will be stored on the hard drive if they have been saved.
hard disks
A storage device is any computer hardware meant to store data permanently or semi-permanently. This includes, but is not limited to hard disks, floppy disks, cdroms and DVDs.
A hard disk is a device that is used to store large amounts of data in a computer system. Hard disks differ from other memory because they are non-volatile, they retain the data even when they do not have power.
A hard disk acts as a storage device for data. Data is also retrieved from the hard disk. The data that is kept in the hard disk is not erased even when the computer is switched off.
CD-R
Question is a bit vague, but you may be referring to hard disks. These are also known as secondary storage - permanent storage.
removable hard disksremovable solid state disks (e.g. USB Flash drives)
access to ram is a lot faster for your computer
hard disk
Hard drives, removable disks, and CDs are ways of storing information for computers. They make the process of backup up or moving data from a computer much easier.
A hard drive.
There are multiple locations for which computing systems can store data. Internal storage includes the hard and soft disks, RAM, optical media, and external memory cards and USB devices. Additionally networks can also store, mirror, and backup the data from individual terminals and workstations onto in or off-site server arrays.