Yes, you can add additional local storage to a TetherBox. The options are:

Note: The minimum supported size is 64GB

You can connect an external drive to a TetherBox via USB. Please note there are some inherit drawbacks and caveats and your choice of drive is critical:

Note: Some external drives may require an additional power supply which will be provided with the drive.
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Once you connected the drive, you can confirm it was picked up by the unit by going to: Admin > TetherBoxes > TetherBox Name

You will be able to see the external drive under the "Storage" tab:
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Note: If you are using Flash or other Solid State Storage, please refer to the Manufacturer's guidelines as some devices (especially smaller capacities) are not designed for frequent rewrites and can fail quickly.

Please refer to our more in depth page on the subject.

TetherX manually configures NAS devices for storage integration. To proceed, please provide the following details to TetherX Support:
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• NAS Model

• Connection Details: IP address, username, password, and protocol (SMB/NFS)

Once we receive the necessary information, setup will be completed within one working day—often sooner.

You can use any NAS that supports SMB or NFS, provided it meets performance requirements. Storing video footage demands high network and drive performance, so avoid lower-end “desktop” NAS models, as they may struggle with sustained write loads.

Example: The image below shows a Synology DS923+, a recommended model:

⚠️ Important: Ensure your NAS and network can handle the required load by calculating: Total required bandwidth = Number of cameras × Average bitrate per camera × 2.5 (the multiple is because the streams need to be fetched from the camera and saved to the NAS).

For Synology/QNAP NAS devices using SMB, apply the following optimisations:
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• Disable the Recycle Bin on the shared folder to ensure deletions are immediate rather than moving files.

• Disable indexing/search features (e.g., Universal Search) to avoid unnecessary system load.

• Disable oplocks and Windows ACLs on the SMB share.

For the technical, this is the default mount path for SMB based shares, please let us know if you would like to use different mount settings:
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//IP-ADDRESS/CCTV /data/timeline/tetherbox-serial/smb1 cifs username=user,password=pass,iocharset=utf8,noperm,noatime,vers=3.1.1,rsize=2097152,wsize=2097152,cache=strict,soft,nounix,noserverino,actimeo=1,closetimeo=0,bsize=8388608,mfsymlinks 0 2

If you experience performance issues, consider adding NVMe caching drives to enable a write cache, significantly improving sustained write performance, you may also benefit from adding additional ram to your NAS.

If you plan to record more than 20 cameras to a NAS, a 2.5GbE or 10GbE network is highly recommended to handle the increased data load.

This may require:

• Upgrading your NAS and/or TetherBox with a higher-speed network card.

• Ensuring your network infrastructure (switches, cables, and routers) supports multi-gigabit speeds.

TetherBox Giga units include a secondary 2.5GbE NIC as standard, providing additional bandwidth for high-camera-count deployments.