All of the mentioned
The storage media are classified by the speed with which data can be accessed, by the cost per unit of data to buy the medium, and by the medium's reliability.
Flash memoryFlash memory is of two types “ NAND and NOR.
Main memoryThe contents of main memory are usually lost if a power failure or system crash occurs.
NOR FlashNAND flash has a much higher storage capacity for a given cost, and is widely used for data storage in devices such as cameras, music players, and cell phones.
CacheCache storage is easy to access because it is closer to the processor.
Compact disksCompact disk is used for easy storage at lower cost .
JukeboxThe most popular form of optical disks are CD and DVD.
Sequential-accessTape storage is used primarily for backup and archival data.
Magnetic disksThe system must move the data from disk to main memory so that they can be accessed .
Write-once, read-many (WORM)There are also "multiple-write versions of compact disk (called CD-RW) and digital video disk (DVD-RW, DVD+RW, and DVD-RAM), which can be written multiple times.
