
In this case, once data on external hard drive gets lost due to deletion, formatting, virus attack, etc. Thus, external hard drive becomes the only copy of your data, and it is no longer a backup. However, it's easy to forget to keep multiple copies for backup. Whereas, is it really safe to keep data on external disk? Many times, you store files on external drive in order to keep a backup. When computer hard drive is running out of space, external hard drive will be the choice for many users to store extra data. In the big data era, a lot of data is generated every day, and we need to access or store data every day. Besides, it is very easy to use, for we can access it by connecting it via computer USB port. We can carry terabytes of data everywhere we go, share data among various machines, backup data, etc. It provides huge amount of storage capacity and it is portable, which brings about great convenience. An external hard drive is actually an average hard drive placed with a SATA/USB connector or enclosure.

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