My company uses a lot of cloud applications, disregarding the actual data held in the apps, on behalf of our employees we provide their PII data by registering them as users of these applications. This registration PII data is frequently held in the USA. Is that a Cross-Border Data Transfers?
If you create the accounts an not the employees themselves, then this may be a transfer of personal data provided that the employees are in the EU. However, most of the cloud providers already have transfer mechanisms in place. For example, DropBox has a Privacy Shield Certification (https://www.dropbox.com/help/security/data-transfers-europe-us ).