I finally figured it out. In case someone stumbles across this:
in ./config/plugins.js
module.exports = ({ env }) => ({
upload: {
config: {
provider: 'strapi-provider-upload-sftp-v2',
providerOptions: {
host: `${process.env.SFTP_HOST}`,
port: `${process.env.SFTP_PORT}`,
user: `${process.env.SFTP_USER}`,
password: `${process.env.SFTP_PASSWORD}`,
basePath: `${process.env.SFTP_BASEPATH}`,
baseUrl: `${process.env.ASSET_URL}`
},
breakpoints: {
xlarge: 1920,
large: 1000,
medium: 750,
small: 500,
xsmall: 64
},
}
},
});
the breakpoints argument is optional.
./extensions/upload/config/settings.json is not needed and you don’t need to put the files in ./providers