Simplified circuit diagrams of harddiskdrive enclosure. The exterior of the caddy typically has two female sockets, used for data transfer and power. These may also be referred to as a caddy – a sheath, typically plastic or metallic, within which a hard disk drive can be placed and connected with the same type of adapters as a conventional motherboard and power supply would use. Pre-built external drives are available through all major manufacturers of hard drives, as well as several third parties. External 3.5-in floppy drives are also fairly common, following a trend to not integrate floppy drives into compact and laptop computers. In the consumer market, commonly used configurations of drive enclosures utilize magnetic hard drives or optical disc drives inside USB, FireWire, or Serial ATA enclosures. In some instances, provides a hardened chassis to prevent wear and tear.Lower the cost of removable storage by reusing hardware designed for internal use.Recovering the data from a damaged computer's hard drive, particularly when it does not share the same interface with the computer used to perform the recovery.Simple and cheap approach to hot swapping.Preventing the heat from a disk drive from increasing the heat inside an operating computer case.Using a network-attached storage-capable enclosure over a network to share data or provide a cheap off-site backup solution.Adding an easily removable backup source with a separate power supply from the connected computer.Transferring data between non-networked computers, humorously known as sneakernet.Adding more drives to any given server or workstation than their chassis can hold.Adding RAID capabilities to computers that lack RAID controllers or adequate space for additional drives.Adding additional storage space and media types to small form factor and laptop computers, as well as sealed embedded systems such as digital video recorders and video game consoles.Key benefits to using external disk enclosures include: An external hard drive enclosure that uses a 2.5-in drive and a USB connection for power and transfer
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