Storage capacity tells you how much can be kept; storage type affects speed, portability, and reliability.
Internal storage
The internal drive normally holds the operating system, applications, and personal files. SSDs are now the practical default for most computers because they start quickly, respond well, and resist ordinary bumps better than mechanical drives.
A drive advertised as 512 GB will show somewhat less usable capacity after formatting and system files.
External drives
External SSDs are compact and fast. External hard drives can provide more capacity for the price, making them useful for larger backups. Neither should be the only copy of important files.
Eject removable media through the operating system before unplugging when writing may still be in progress.
USB flash drives and memory cards
Flash drives are convenient for transferring modest amounts of data, but their small size makes them easy to lose. Memory cards are common in cameras and some phones. Check the physical format and capacity standard supported by the device.
A flash drive found in public should not be plugged into a computer; it may contain malicious software.
Capacity planning
Documents consume little space compared with photos, video, and games. Check current usage before choosing a new drive. Allow room for growth, operating-system updates, and temporary work files rather than filling the drive immediately.
Quick skill check
- Check current used and free space
- Know which files consume the most room
- Use external storage as an additional copy
- Eject media safely
- Protect portable drives containing private information