Secondary Storage

File Compression

Extracting a zip file. (Decompression)

File compression decreases the size of files and makes it easier for file transfer and storage as it saves space and requires less time to transfer. Files that have been compressed are called ZIP files. To reobtain compressed files programmes to decompress files are required.

Head Crash 

Head Crash Hard Disk

Head crash is also know as disk crash. This occurs when the head comes into contact with the disk and scratches it or burns it. Information is then loss, so it is important to operate hard disk drives in clean environments to avoid dust particles or smoke particles to enter the disk drive and cause the head that usually hovers several microinches above the disk to come into contact with the disk.

Internet Hard Drive

Internet hard drives provide the user the ability to access their stored documents from any computer that has access to the internet. It allows one to upload their documents into a remote hard drive, and allows retrieval of documents from any computer.

Optical Disc Drive

Optical Disc Drives

An optical disc drive is an area that allows optical discs to be inserted into the computer, and is usually built into the computer and pops out with the touch of a button. Most optical drives can play or record on many different disc formats. 

Solid-state Storage

Solid-state storage is similar to larga capacity, nonvolatile memory. Rather than magnetic or optical media, integrated circuits (ICs) are employed. Solid-state storage is non-volatile and allows removal of stored items.