Portable Memory
There are several reasons why removable storage is useful:
- Commercial software
- Making back-up copies of important information
- 在两台计算机之间传输数据
- Storing software and information that you don't need to access constantly
- Copying information to give to someone else
- Securing information that you don't want anyone else to access
Modern removable storage devices offer an incredible number of options, with storage capacities ranging from the 1.44 megabytes (MB) of astandard floppyto the upwards of 20-gigabyte (GB) capacity of some portable drives. All of these devices fall into one of three categories:
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- Magnetic storage
- Optical storage
- Solid-state storage
In the following sections, we will take an in-depth look at each of these technologies.