Watchpoints and best practices for file shares

Before you begin to migrate content from a file share, make sure you review the G Suite Migrate best practices. Then, familiarize yourself with the following file share points. 


Watchpoint Best practice
Large single user migrations—A migration of 50,000 files or more to a single user’s Google Drive requires additional planning. Use a sharding users list to spread the migration load among many user accounts.

To determine the number of user accounts to add to the list, use the larger value of: 

  • One account per 50,000 files that are being migrated to Drive
  • 10 accounts per node

We recommend you set up temporary G Suite users for your sharding users list. Then, delete the users after you complete the migration. For details, see Create a sharding users list

Migration phases—Plan your migration phases carefully, taking into consideration the size and complexity of the data. Plan to migrate fewer than 20 million files in one phase.
External ACLs—During a migration, you can resolve and add external users or groups with a Google Account.

For external users or groups without a Google Account, send an email with a custom access link at migration time.

Before the final migration, you might want to reduce the amount of time that users outside of your domain have access to migrated files. To do so, during the final incremental migration:
Custom sharing–Shared drives do not support custom sharing on subfolders at this time. During a migration, file share folders that maps to shared drive subfolders will lose all custom permissions.

For more details on shared drives, see Best practices for shared drives.

For more details on shared drive migration configuration options within G Suite Migrate, see Understand file share settings templates.

Data migrated to shared drives
  • You can’t migrate content to a user's My Drive and shared drives in one migration. You must run these migrations separately.
  • If you’re migrating to shared drives, you must use a shared drives settings template. Learn more about settings templates.
Access level in Drive—If you're migrating content to Google Drive, the target user must have the correct access level before you start the migration. Make sure that the target user specified in the mapping has the appropriate access level in Drive:
  • If you're migrating data to an existing shared drive, the user needs to be a content manager or manager of the shared drive. If you're creating a new shared drive during the migration, the specified user is given the manager role. Learn more about Shared drives access levels.
  • If you're migrating data to a folder in a user’s My Drive, the user must be an owner of the folder.

Next step

Now it's time to set up a file share connection. To get started, see Add or edit a file share connection.