The STU model signature tablets do not require a driver, though the Wacom STU Driver is recommended if using a Windows 10 system for optimal performance. The STU-530 uses a light driver to support bulk transfer. The driver is included in the SDK, or can be obtained here - https://developer-support.wacom.com/hc/en-us/articles/9354527258007-STU-Driver-Installation
Keep in mind the STU-model signature pads are not 'plug-and-play' - they require software with components derived from our related SDKs to initiate the signature signing ceremony with the device such as our sign pro PDF application, third-party integrations or your own solution.
Feel free to visit our Developer Documentation portal to see if the information you need is available there:
https://developer-support.wacom.com/hc/en-us
If you continue to have questions our Global Signature Development Team (GSDT) provides technical support via our dedicated support system here (i.e., related to Wacom for Business STU-models):
https://developer-support.wacom.com/hc/en-us/requests/new