A minor system software update is now available for the PlayStation Portal. Version v4.0.1 of the PS Portal System Software improves overall system stability and usability on certain screens.
This minor update follows on from the major update last month (PS Portal System Software v4.0.0), which added Cloud Streaming to the portal device, without the need to have a PS5 console.
You can update your PlayStation Portal by going to [Settings] > [System] > [System Software] > [Update System Software].
PlayStation Portal Firmware Version 4.0.1
- We’ve improved system software performance and stability.
- We’ve improved the messages and usability on some screens.
You can check out the PS Portal Firmware history here.
Source: PlayStation Support