Leave the USB stick inserted, then turn the CPT-AS off and back on.
If the error occurs again, check that the downloaded update files are correct (with the ".update" extension) and that they are placed in the root directory of the USB stick.
It is recommended to use a USB stick formatted in exFAT.
If the problem persists, we invite you to contact our support service, available 24 hours a day, using the following link: https://support.pagani-geotechnical.com/hc/it
https://support.pagani-geotechnical.com/hc/it/requests/new