Please enable the AI and Paid features in the Settings tab before using this feature.
To Share File in Bulk please open the Folder Tools menu->List&Share Multiple Files and do the following:
1. List files from a folder: Add the folder id and click the List Files in Sheet button. The files will be listed in the Sheet with headers.
2. Add the emails of the users you want to share the files with.
3. Add Share Type for each file: editor, viewer, commenter, owner, anyone.
The owner permission will transfer the ownership of that file with the users.
4. Click Share Files.
The Remove All Permissions button will remove any permissions of the files listed.
You can also watch this video tutorial.