Top NAS Storage Devices for 2021

Network-attached storage (NAS) allows users to access files stored on a NAS device from multiple other devices that are on the same computer network as the NAS. Some NAS devices enable remote access, which functions similarly to cloud storage: users in a different location can still connect to the network and access the files stored on the device.

NAS devices are most useful for small businesses that need to store and share files and personal users who want to store or stream data in their home. Households that share a lot of media or documents can benefit from a NAS device. NAS devices are often used for their data backup capabilities. One common use of NAS devices is for Random Array of Independent Disks (RAID), a method of backing up data to the next disk over if the original disk fails.

Some technology and storage experts believe that NAS is on the way out the door—it’s less relevant because the cloud also provides remote access from any location with an Internet connection. Though they have a point, NAS devices are still often much cheaper than cloud storage packages. That’s one of the reasons small businesses, self-employed individuals, and smart home owners still use them despite the proliferation of the cloud.

NAS users aren’t just working with your average Google Drive storage amount—they typically need much, much more capacity. NAS devices, though they cost a bit more at the outset, offer longer-term savings by avoiding monthly storage payments.

How to Select NAS Devices

NAS devices encompass a broad array of sizes. You’ll first want to consider how much storage you need, depending on how many people will be storing or accessing data, if you want to stream a lot of media, and whether you need business-level file storage or just enough for personal use. Typically, the more bays a device has for disks, the more storage capacity it offers.

Storage capacity also must balance with budget. Though purchasing a NAS device can save you a significant amount of money in the long run compared to cloud storage, it’s still an up-front investment. Keep both your budget and your desired storage capacity in mind as you shop.

NAS devices are sold either diskless (you have to purchase the hard drives separately) or prepopulated. NAS manufacturers will recommend their own hard drives for their devices, but that doesn’t mean that other drives are incompatible—for example, that a Seagate hard drive wouldn’t work inside a Synology NAS. Do independent research if you’re planning to buy NAS devices and HDDs from different manufacturers; typically the seller will list which drives are compatible with their NAS.

A few other things to consider:

  • What ports do you want on your NAS device? Are you planning to connect it to your TV for streaming movies regularly, or do you want to plug other hardware into it? You might want HDMI or USB ports.
  • Do you want support for a lot of third-party applications? If so, you’ll need a NAS that readily supports a variety of applications and has a high-performing processor.
  • Is the device compatible with your Wi-Fi network? How well does it connect? That will affect how easily you can access data through that network.
  • How much backup do you want? Does your data need a battery that will save data in case of a complete outage, or do you want an external uninterrupted power supply? Does the NAS support RAID? One-bays, such as Western Digital’s My Cloud Personal, will not.

The following overview covers seven NAS devices from some of the most recognized NAS providers. We’ve listed our choices for the best devices depending on your main reasons for purchasing a NAS, including their best features and some potential drawbacks.

Jump to:

Top NAS Storage Devices

Synology DiskStation DS220+

Best bargain NAS for overall quality

Synology’s DS220+ is one of the best two-bay NAS devices on the market. It’s comparable in price to other two-bay devices, but its superior performance and quality are what make it such a bargain. The DS220+ offers RAID protection and disaster recovery for data.

The DS220+ uses Synology’s DiskStation Manager software, which serves as a type of operating system for all Synology NAS devices. The DS220+ is straightforward to set up and use. For users who need to store and manage media, it provides applications for video, photo, and audio. And for buyers who want the best performance from a small NAS, it’s the best overall value and quality.

QNAP TS-251D

Great NAS for personal and home use

The TS-251D, less expensive than Synology’s DS220+, has plenty to offer: an Intel Celeron dual-core processor, an Ethernet port, five USB ports for connecting other devices and drives, and an HDMI port for streaming media. The two-bay TS-251D is a really solid quality NAS device, which is why we recommend it for home users. If you want to play videos regularly, the TS-251D is one of the best two-bay NAS choices for media storage and streaming.

Western Digital My Cloud EX2 Ultra NAS

Runner-up for personal and home use

If you want a good WD drive for your home, but the Personal’s lack of two bays is a dealbreaker, then the EX2 Ultra, with its two bays and RAID option, is a good alternative. It offers up to 28 TB of storage, if you really need that much and have over a thousand dollars to spend. But if not, it’s available in many more modest storage sizes as well.

The EX2 Ultra has a dual-core processor and is a good option for personal storage and streaming. Be aware, though, that some of Western Digital’s personal NAS devices have received a slew of bad reviews for significant storage failures and slowdowns, as well as criticism for WD failing to give support when devices or backup failed.

Synology DiskStation DS920+

Best for very small businesses with advanced tech needs

The DS920+ is one of the best NAS devices on the market, and it could fall into a lot of these categories. If you have a small business and need a lot of high-speed, high-quality data storage and backup, the four-bay DS920+ is on your shortlist. It offers multiple versions of RAID and support for many applications, both third-party and Synology.

Synology is known for easy-to-use, good quality software, and the DS920+ is no exception. But the reason it’s the best choice for SMBs that need advanced storage is its two NVMe SSD ports. Not many NAS devices offer this feature, but in the DS920+ it’s just another perk.

Synology DiskStation DS1821+ 

Best NAS for small businesses

Synology tech, eight bays, and under a thousand dollars: the DS1821+ is one of many in a long line of high-quality, high-performance NAS devices that Synology offers small businesses. If you need more data storage than the DS920+ can offer, and you know there’s a possibility that amount will need to scale, the DS1821+ is your go-to: it’s compatible with Synology expansion bays, up to eighteen drives.

And for those that think the era of NAS devices is completely over, DS1821+ support for NVMe challenges their supposition by offering connectivity to some of the fastest data storage on the planet. This device also has two M.2 ports.

Drobo 5N2

Good choice for users accessing files remotely

The 5N2 is nicely set up for homes and small offices, especially businesses that have employees in different locations. Its Ethernet ports connect to a computer directly. The 5N2 offers encryption for remotely accessed files and a disaster recovery system. Its five bays provide plenty of storage for media such as videos and music.

One selling point of the 5N2 is its battery, which is a last-ditch protection for data should all of the disks fail. Though it’s a bit expensive, and the cooling fan can be a bit loud, the 5N2 offers good performance and data protection. If your employees find themselves needing to reach files from other cities while keeping those files secure, the Drobo 5N2 is a good option.

Asustor AS5304T

Best choice for gaming or heavy-duty media streaming

The AS5304T, also known as the Nimbustor, is one of the best NAS devices for gamers, but it’s more versatile than that. The Nimbustor, which comes with camera licenses, can also serve as part of a home surveillance system. It has four bays and support for RAID.

It has an Intel Celeron processor with quad cores, two Ethernet ports, an HDMI port, and three USB 3.2 ports. The Nimbustor is a good choice for users who need to download a lot of applications onto their NAS device. It’s pricey but a solid purchase, especially if you’re looking for a lot of power to store and stream game or media data.

Jenna Phipps
Jenna Phipps
Jenna Phipps is a contributor for Enterprise Mobile Today, Webopedia.com, and Enterprise Storage Forum. She writes about information technology security, networking, and data storage. Jenna lives in Nashville, TN.

Latest Articles

What Is Disk Cloning Software?

Disk cloning software creates a complete copy of a computer's internal hard drive. All that is stored in persistent memory on that computer, including...

JBOD vs. RAID

Both JBOD and RAID have their strengths and weaknesses in data storage – and both have their advocates among storage professionals.  To be sure, there...

Archiving Software: Four Key Data Archiving Features

Data archiving software is an essential building block of data storage, because every company needs to store sensitive, important data in a secure and...