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Technically, you can get a NAS for a couple of thousand dollars or less - a little box that holds a single hard drive and plugs in to the network is TECHNICALLY a NAS. &nbsp;HOWEVER, In my opinion, buying a NAS that costs less than HIGH 5 figures is pointless. &nbsp;The EXPENSIVE NAS systems offer a variety of features including expandability and features like snapshots (akin to Windows 2003's Volume Shadow Copy). &nbsp;Smaller units cost $$$ when you can just buy a RAID controller and a few drives for an existing server or even buy a new server to act as a file server that is cheaper/more expandable than a Snap server or Powervault storage unit.
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Technically, you can get a NAS for a couple of thousand dollars or less - a little box that holds a single hard drive and plugs in to the network is TECHNICALLY a NAS.  HOWEVER, In my opinion, buying a NAS that costs less than HIGH 5 figures is pointless.  The EXPENSIVE NAS systems offer a variety of features including expandability and features like snapshots (akin to Windows 2003's Volume Shadow Copy).  Smaller units cost $$$ when you can just buy a RAID controller and a few drives for an existing server or even buy a new server to act as a file server that is cheaper/more expandable than a Snap server or Powervault storage unit.

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What is NAS and SAN? please give detail explain and how to choose and implement! Thanks!
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What is NAS and SAN? please give detail explain and how to choose and implement! Thanks!

What is NAS and SAN?

The term "Backup" means the methods and processes involved to copy computer data (system data as well as application data) to media other than the ones where the data originally live (disk, tape, optical, cloud). "Restore" in turn means the methods and processes involved in data recovery, i. e., bringing back copied computer data to their original location. Backup/Restore primarily serves as a means of protection against data loss, be it due to disaster, corruption or sabotage. It can also be used for recovering data from an earlier point in time and even for cloning machines or applications. There is a wide variety of backup/restore software available, from expensive commercial products to free or open source tools.

Storage Software

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.