This is the most comfortable and feature rich possibility for conducting evaluations.
Devices can connect to a server by simply scanning a QR Code, removing the need of manually inputting complex server credentials.
Content can be sent to a device by a simple click of a button.
The progress of the evaluation and state of the device can be observed in Valuatic Studio. Results can easily be downloaded from the server and exported in various formats.
As only a file server is required, no complex configurations or installations are needed. You can use any server supporting the WebDav protocol like NextCloud. Even a simple network attached storage (e.g., Synology NAS) will do.
If you need to scale your evaluation over a large number of devices and locations, the support for Amazon S3 will be a good solution as well.