Thank you for your inquiry.
Currently there is no option to export debug terminal output from ES to a file other than copy pasting it to a text file.
We will add this to our feature wish list so it might be added to a future version of Embedded Studio.
Please read the forum rules before posting: Forum Rules
Keep in mind, this is not a support forum. Its main purpose is user to user interaction.
Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
Should you be entitled to support contact us per e-mail.
Alternatively our support system can be used as well: segger.com/ticket/