Goal: Increase the image storage size for the “Single Page – Page Header Row” from 256kb to 512kb.
Admin URL:
/admin/structure/media/manage/single_page_page_header/fields/media.single_page_page_header.field_media_image_8
Drush command:
drush cset field.field.media.single_page_page_header.field_media_image_8 settings.max_filesize '512 KB' -y