data storage - personal Flashcards
1
Q
data storage
A
refers to the ability of a computer/electronic device to retain information over time
- allows saving + retrieving of data
2
Q
primary vs secondary storage
A
primary: volatile
- RAM + cache
- cache closer to CPU, stores frequently accessed data for high speed
secondary: non-volatile
- retains data when power is off, for long-term storage
- HDDs and SDDs and optical drives
3
Q
data storage methods
A
refers to the processes and tech that stores + manages digital data
4
Q
storage methods for personal data
A
can be local, cloud-based, or mobile-based
- local: saving data on computer’s hard drive, or portable devices like USB
- managed by OS, can be encrypted
5
Q
hard drives
A
- HDDs + SSDs store data from computers/other digital devices
- HDDs: a disk, using magnetic pulses to show zeros and ones; susceptible to wear and are slower bcuz moving parts
- SSDs: flash memory chips, memory cells accessed electronically; faster, reliable, lower power consumption bcuz no moving parts
6
Q
portable hard disks
A
- USB, thumb or flash drives
- USB: uses USB ports, cheap, variety of storage capacities
- Portable hard drives: larger, more storage capacity, used for backing up data/storing large files; also uses USB, powered by USB or external power source
7
Q
mobile storage
A
- mobile devices can store personal data w/ limited capacity
- if used for sensitive information, use safety measures; passwords, encryption, biometric data
8
Q
cloud storage
A
- provides remote access to data via the internet
- accessed using web browsers/dedicated apps and maintained by cloud storage providers like Microsoft and Google
- servers maintained in data centers, can store data so it can be accessed from any device with internet through login
- data replication: data broken into blocks, distributed across multiple servers + centers; makes sure data = always available
- usually encrypted in transit and at rest; until authorized users access it
