TerraMaster TOS 5

TerraMaster releases TOS 5.1.19 update for NAS



There’s a new update on the block from TerraMaster. This release bumps the NAS operating system up to TOS 5.1.19, but while it could be considered minor, we’d still recommend installing it. Here’s everything that’s included in this update and how to go about installing it on your TerraMaster NAS.

What’s new in TerraMaster TOS 5.1.19?

Here are the change notes supplied by TerraMaster:


  • Optimized some settings of initialization.
  • Remove restrictions on third-party brand memory.


  • Fixed some issues of certificate.
  • Fixed some issues of shared folder.

This update is applicable for the following TerraMaster NAS: F2-220, F2-420, F4-220, F4-420, F5-420, F2-221, F2-421, F2-422, F4-221, F4-421, F4-422, F4-223,F5-221, F5-225, F5-421, F5-422, F8-421, F8-422, F2-223, F4-223, F2-423, F4-423, T6-423, T9-423, and T12-423.

How to install this TOS update

Because it’s relatively small in size, you can ensure your best TerraMaster NAS is up-to-date in a few moments. Remember: this update is for x86 (Intel) TerraMaster NAS only. Simply follow these steps:

  1. Go to TOS > Control Panel > General settings > Software update.
  2. Check the option Online update.
  3. Click Apply.
  4. Follow the update wizard to finish the update.

You can also install the latest version of TOS manually if you don’t have net access on the TerraMaster NAS at this very second:

  1. Download the update from the TerraMaster website.
  2. Go to TOS> Control Panel> General Settings> Update & Restore.
  3. Click Manual Update.
  4. Click Browse and choose the downloaded update file.
  5. Click Apply.
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