TerraMaster TOS 5 Announced and Launches Insider Preview Program

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TOS 5 comes with new features and new user interface along with the new TNAS App 3


November 11th, 2021 Shenzhen, China – TerraMaster, a professional brand that specializes in providing innovative storage products for home, businesses and enterprises, announces the TOS 5 update for TerraMaster devices. Throughout the year, TerraMaster added more than 50 features and more than 600 improvements to the TerraMaster TOS – more than 300000 lines of codes from our hardworking professional engineers.

The new and improved TerraMaster TOS 5 operating system is designed for professional users to meet business needs and more with improved responsiveness, tighter security, and ease of use. The TerraMaster TOS 5 features a new interface that’s designed to be more convenient and easier to use. Below are some of the key features of the new TOS 5 for TNAS devices.


More Responsive

The TerraMaster TOS 5 operating system is 3X more responsive than the previous version thanks to its progressive JavaScript integration. Now, the loading speed is faster and lighter to the system. With its new interface, managing your TNAS is simpler and straightforward.

Modern and Intuitive

The TerraMaster TOS has an intuitive design with a modern user interface to help even the most novice users manage their TNAS device with ease. Its improved lightweight and web-optimized design isn’t just user-friendly but also friendly to your system’s resources.

One-Time Password (OTP)

For improved security in this modern age, TNAS now supports the One-Time Password (OTP) security feature with TerraMaster TOS 5. This newly added user verification feature provides tighter security against unknown entities. OTP is generated via the TNAS mobile app, restricting users outside the network to gain security credentials on your TNAS device.

Comprehensive Backup Options

TerraMaster continues to enhance its data backup options for its TNAS devices. Now, the TerraMaster TOS 5 system is a unified portal to access multiple available data backup options. Backup options include central backup, TerraSync, dual backup, snapshot, USB Copy, CloudSync and other full range of backup tools to meet the needs of different clients, different backup strategies, and different data backup destinations.

TRAID Flexible Disk Array

By optimizing traditional array patterns, TerraMaster RAID provides you with flexible array configurations, flexible online migration, expansion, and redundancy strategies that provide solutions and security for changes in storage space due to new business requirements while increasing disk space utilization.

Efficient and Convenient File Deduplication

TerraMaster TOS 5provides flexible, secure file deduplication options to improve storage space utilization. The simple and intuitive configuration menu makes it easy for beginners to use, eliminating the need for training and reducing the cost of operation and maintenance.

TNAS Mobile 3 App

Along with the TerraMaster TOS 5, TerraMaster also updates its mobile app introducing the new TNAS Mobile 3. The improved TNAS app features a new user interface with new features including phone backup, photo management, personal folders, team folders, personal safes, TerraSync, administrative tools, and more. The new and improved TNAS Mobile App 3 makes remote TNAS access and management easier.

TerraMaster TOS 5 Insider Preview Program

TerraMaster is recruiting testers for the TNAS TOS 5. To participate in the preview program, please send an email to our team with a request to participate and tell your name, TNAS model number, the purpose of your TNAS, then wait for our further confirmation. Due to quota limitations, we can only pick some users from the applicants to participate in the first preview.

Registration Date: November 11th – 18th, 2021 (First Batch)

Registration contact: fc@cybermedia.com.tw


  1. Registration
  2. Qualification
  3. Shortlist Announcement
  4. Testing
  5. Review and Bug report

Important Notes

  1. Have a TerraMaster x.86 TNAS device, such as: 220 series, 221 series, 420 series, 421 series, 422 series
  2. Back up your data before installing the new system
  3. The preview version is not suitable for working or production environments. There are risks of data loss

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About TerraMaster

TerraMaster is a professional brand that focuses on providing innovative storage products, including network attached storage and direct attached storage that has become increasingly popular in over 40 countries and regions. The brand has been developing storage technology for 10 years, addressing the needs of customers such as home users, small/medium businesses, and enterprises.

We are influencers and brand affiliates.  This post contains affiliate links, most which go to Amazon and are Geo-Affiliate links to nearest Amazon store.