Issues have been noticed in many of the G Suite services, most particularly Gmail.
The issues, also being seen in the case of Google Drive, are of an intermittent nature. Users are generally able to access Google Drive, Gmail and hangout, but are encountering what IT support staff calls "high latency, and/or other unexpected behaviours".
Many users are facing, or are likely to face, problems while trying to attach or access files.
Here is a brief nature of the issues:
Gmail: Attaching or accessing attachments, as well as accessing and saving draft emails and sending emails.
Drive: Unable to share files, Upload and download of files.
Thousands of users have flagged these issues on Twitter.