In Google Drive

Go to drive.google.com.
Select a file or folder.
At the top, click the share icon .
In the bottom right, click Advanced.
Next to "Prevent editors from changing access and adding new people," check the box.
Click Save changes.

In Docs, Sheets, or Slides

Go to a Docs, Sheets, or Slides home screen.
Open a file.
In the top right, click Share .
In the bottom right, click Advanced.
Check the box next to "Prevent editors from changing access and adding new people."
Click Save changes.

If you turn this setting on for an item, here are two things to keep in mind:

If that item is added to a shared folder and the shared folder's advanced sharing options are later changed, those changes will not be applied to the item that was added to the shared folder.

If you create a new item in a folder that has this setting on, that new item will not inherit the setting. To apply the setting to the new item, follow the instructions above.

Anonymous wrote:OP here. Thanks everyone - great info!

Anonymous wrote:I'm beginning to transition from DropBox to Google Docs as a way to store/share the documents for our very small non-profit. We don't have office space, so we share everything via e-mail and in the cloud. If I share a Google folder with two other individuals, does that mean that any documents and subfolders that I add to the main folder can be viewed/edited by the two individuals (which is what I want to do)?

Also, if anyone has ideas for transferring documents from DropBox to Google Docs I'd love to know. Right now, I've been downloading from DropBox then uploading to Google Docs, but it is extremely time-consuming.