Storage

1. Optical disc

1.1. CD

1.1.1. CD-R

1.1.1.1. CD-RW

1.1.2. CD+R

1.1.2.1. CD+RW

1.1.3. CD-ROM

1.2. DVD

1.2.1. DVD-R

1.2.1.1. DVD-RW

1.2.2. DVD+R

1.2.2.1. DVD+RW

1.2.3. DVD-ROM

1.3. Blu-ray

2. Capacity

2.1. Kilobyte

2.2. Megabyte

2.3. Gigabyte

2.4. Terabyte

2.5. Petabyte

2.6. Exabyte

2.7. Zettabyte

2.8. Yottabyte

3. storage medium

3.1. Volatile memory

3.1.1. Hard disk drive

3.1.1.1. Internal

3.1.1.2. External

3.1.1.3. Removable Hard disk

3.1.2. Random Acess memory

3.2. Nonvolatile memory

3.2.1. Complementary metal-oxide-semiconductor

3.2.2. Flash memory

3.2.2.1. compact flash

3.2.2.2. xD-Picture Card

3.2.2.3. Memory Stick

3.2.2.4. Memory stick micro(M2)

3.2.2.5. microSD

3.2.2.6. microSDHC

3.2.2.7. Secure digital

3.2.2.8. Secure Digital High capacity

3.2.3. Read-only memory

4. Network

4.1. Cloud storage

4.1.1. Youtube

4.1.2. Facebook

4.1.3. Amezon

4.1.4. Idrive

4.1.5. Googledoc

4.2. Network attached storage

5. Other type of storage

5.1. tape

5.2. Smart card

5.3. Micro film

5.4. Enterprise storage