A really good option if your data is super important to you and/or your business is the QNAP TS-251 Network Attached Storage enclosure. This comes supplied with no hard drives, you have to add you own, but has some distinct advantages.
Firstly, the two previous hard drives I recommended are connected to one computer at a time, which is great in plenty of scenarios. A "NAS" connects to your network via an ethernet cable. It acts as a central storage location for all your files. This would allow you to backup your desktop and laptop with ease and access your files on either, or even from your smartphone or tablet. Many NAS products, including this one, also allow you to install applications on the device to make backing up and other tasks a lot easier.
Secondly, a NAS like this has room for two hard drives. You can get other models that accommodate even more. This allows you to have data redundancy, which means one hard drives data is mirrored (or copied) to the second hard drive. If one fails, then you have a mirror image of it, so your data is still safe. Of course, both hard drives could fail, but it is very rare for this to happen at the same time.
The main features of this particular model from QNAP are;
- Centralize your file storage, sharing and backup with excellent performance
- Run multiple Windows, Linux, UNIX and Android based virtual machines with the Virtualization Station
- Operate multiple isolated Linux systems as well as download containerized apps with Container Station
- Enjoy the best audio-visual experience with HDMI output and the free remote control
- Transcode Full HD videos on-the-fly or offline* Stream multimedia files via DLNA, AirPlay, Chromecast and
- Bluetooth with multi-zone multimedia control
- Scale up to 12 drives with QNAP UX-800P expansion enclosure
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