To get the Google Drive report, login as the GApps administrator. Open the Google Admin panel and follow the steps given below.
1. Go to the Admin Panel >> Reports >> Apps Usage Activity
2. Go to ‘Select Columns’ option
3. Select the columns as shown in image below and click on ‘Apply’.
4. Now, download the results as a CSV file. Send the downloaded CSV report to us. This report will help us in providing you an ETA for Google Drive migration.