There are several storage devices that are commonly used to store data in a computer:

1. Hard Disk Drive (HDD): This is the most common type of storage device used in computers. It uses magnetic storage to store data on spinning disks. HDDs provide a large amount of storage space at a relatively low cost.

2. Solid State Drive (SSD): SSDs are becoming increasingly popular due to their faster read and write speeds compared to HDDs. They use flash memory to store data, which allows for faster access times. SSDs are generally more expensive than HDDs but offer better performance.

3. USB Flash Drive: These small portable devices use flash memory to store data. They are commonly used for transferring files between computers or for backup purposes. USB flash drives are convenient due to their small size and ease of use.

4. Optical Drive: Optical drives, such as CD/DVD drives, use optical storage to read and write data. They are less commonly used nowadays due to the rise of digital media and online content, but they can still be found in some computers for legacy purposes.

5. Network Attached Storage (NAS): NAS devices are dedicated storage devices that connect to a network and allow multiple computers to access and store data. They are commonly used in homes and small businesses to centralize storage and backup data.

6. Cloud Storage: Cloud storage involves storing data on remote servers accessed through the internet. It offers the advantage of being accessible from anywhere with an internet connection, and data is often automatically backed up. Cloud storage services include Dropbox, Google Drive, and Microsoft OneDrive.

The choice of storage device depends on factors such as the required storage capacity, speed, cost, and specific needs of the user or organization.