Best Network Attached Storage Nas Devices in 2026

Extended drive testing to ensure each drive is tested for extended reliable operation

5-year limited warranty(3) | (3) See official Western Digital website for regional specific warranty details.

Built for small or medium business NAS systems in a 24/7 environment

3-year limited warranty(3) | (3) MTBF specifications are based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions: workload of 90TB/year and drive temperature of 40°C. Derating of MTBF will occur above these parameters, up to 65°C drive temperature. MTBF does not predict an individual drive’s reliability and does not constitute a warranty. Not all products may be available in all regions of the world.

Integrated media server to support multimedia content streaming. Freely access private cloud files on-the-go and back up mobile photos with iOS and Android apps

Compatible Drive Type - 3.5 inch SATA HDD, 2.5 inch SATA HDD (with optional 2.5 inch Disk Holder), 2.5 inch SATA SSD (with optional 2.5 inch Disk Holder). "Compatible drive type" indicates drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay

Check Synology knowledge center or YouTube channel for help on product setup and additional information

Check the product specification page for the software or application you want to use

Add up to 10 extra drive bays with 2 DX517 expansion units for a maximum of 15 storage drives

Check Synology knowledge center or YouTube channel for help on product setup and additional information

Check the product specification page for the software or application you want to use

SATA device only

Expandable storage: The DS1821+ can be expanded up to 18 bays by connecting two DX517 expansion units.

Sophisticated software: The DS1821+ comes with a wide range of software applications, including file sharing, backup, virtualization, and multimedia streaming.

3 x USB 3.2 Gen 1 ports

5 x 3.5-inch + 4 x 2.5-inch SATA 6Gb/s (Diskless).4 GB SODIMM DDR4 Memory (Max 16GB)

Automatic file synching across all your computers

Simplified file and folder sharing

BACK UP MULTIPLE COMPUTERS & DEVICES – PC backup software included, and you can set up automated backups of data on your computers and mobile devices.

SECURELY SHARE FILES WITH FAMILY & FRIENDS – Create individual access of folders to ensure your data remains private while securely share storage space or files with others.

ORGANIZE AND SECURE YOUR DATA – Use NAS as an easy-to-access central storage location. No more searching through different external drives or cloud accounts.

4TB capacity – 1 Drive bay, HDD included.

Made in Japan – Quality Devices.

24/7 US-based support, with 2-year warranty, including hard drives.

BACK UP MULTIPLE COMPUTERS & DEVICES – PC backup software included, and you can set up automated backups of data on your computers and mobile devices.

SECURELY SHARE FILES WITH FAMILY & FRIENDS – Create individual access of folders to ensure your data remains private while securely share storage space or files with others.

ORGANIZE AND SECURE YOUR DATA – Use NAS as an easy-to-access central storage location. No more searching through different external drives or cloud accounts.

6TB capacity – 1 Drive Bay, HDD included.

Made in Japan – Quality Devices.

24/7 US-based support, with 2-year warranty, including hard drives.

Backup for all your PC and Mac computers

Transcode 10-bit 4K H.265 media with hardware decoding easily enables smooth video playback

3 year warranty. Asustor will repair or replace any unit that is hardware damaged during the 3-year period so you can feel worry free when using any Asustor product

SECURE YOUR PRECIOUS DATA - Storage designed to keep your data safe, the NAS features a closed system to reduce vulnerabilities from 3rd party apps and SSL encryption for secure file transfers.

BACK UP MULTIPLE COMPUTERS & DEVICES – PC backup software included, and you can set up automated backups of data on your computers and mobile devices.

SECURELY SHARE FILES WITH FAMILY & FRIENDS – Create individual access of folders to ensure your data remains private while securely share storage space or files with others.

4 TB Total capacity – 2 Drive Bays ships with RAID 1 (Automatic Backup) = 2 TB usable capacity. Set to RAID 0 to use the full 4 TB.

DIRECT COPY - Back up your devices via USB. Copy photos/videos/files without a computer.

MADE IN JAPAN - Quality Devices.

24/7 US-BASED SUPPORT - With 3-year warranty, including hard drives.

RELIABLE STORAGE W/ EFFORTLESS SETUP: RAID 5 pre-configured for out-of-the-box protection to save you time and effort.

CLOUD INTEGRATION: Sync with Amazon S3, Dropbox, Azure and OneDrive to create a hybrid cloud for extra data security, cost savings, and flexible scalability.

10X AS FAST TRANSFER SPEEDS: 10GbE gives you 10x as data fast transfer speeds as 1GbE with CAT 6A or higher-rated cabling.

REMOTE MANAGEMENT SERVICE INCLUDED: Save time and resources by managing multiple NAS from a single console.

PEACE OF MIND INCLUDED: 3-year warranty (includes hard drive coverage) with 24/7, award-winning US-based support. (Additional warranty options available.)

DATA RECOVERY SERVICE: Device qualifies for free simple logical data recovery when registered.

32 TB CAPACITY – 4 pre-tested, NAS-grade hard drives included. Ships in RAID 5 for 24 TB usable capacity; can change to RAID 6 for more redundancy, or RAID 0 for full 32 TB.

CLOUD INTEGRATION: Sync with Amazon S3, Dropbox, Azure and OneDrive to create a hybrid cloud for extra data security, cost savings, and flexible scalability.

16 TB CAPACITY – 2 pre-tested, NAS-grade hard drives included. Ships in RAID 1 for 8 TB usable capacity; can change to RAID 0 for full 16 TB.

PEACE OF MIND INCLUDED: 3-year warranty (includes hard drive coverage) with 24/7, award-winning US-based support. (Additional warranty options available.)

MADE IN JAPAN - Quality made data storage.

FAST DATA TRANSFERS - Native 2.5GbE port for high speeds with no cable upgrade needed.

REMOTE MANAGEMENT SERVICE - Save time and resources by managing multiple NAS from a single console.

DATA RECOVERY SERVICE – Qualifies for free simple logical data recovery with award winning support when registered.

Synology NAS chassis comes in a sealed box.

Hard drives and memory upgrades included separately NOT installed, installation required.

PURPOSE-BUILT STORAGE WITH DATA SECURITY FOCUS – Storage designed to keep your data safe, the NAS features a closed system to reduce vulnerabilities from 3rd party apps and SSL encryption for secure file transfers.

CLOUD INTEGRATION - Sync with Dropbox, Azure and OneDrive to create a hybrid cloud for extra data security, cost savings, and flexible scalability.

SECURELY SHARE FILES WITH FAMILY & FRIENDS – Create individual access of folders to ensure your data remains private while securely share storage space or files with others.

ORGANIZE AND SECURE YOUR DATA – Use NAS as an easy-to-access central storage location. No more searching through different external drives or cloud accounts.

4 TB Total capacity – 1 Drive Bay, HDD included.

MADE IN JAPAN - Quality Devices.

24/7 US-BASED SUPPORT - With 2-year warranty, including hard drives.

Small or medium business NAS systems in a 24x7 environment

3-year limited warranty | See official Western Digital website for regional specific warranty details.

Small or medium business NAS systems in a 24x7 environment