Follow these steps to change the default file types allowed for the shared drive:

1. Check with the administrator of the shared drive: Ask the administrator what types of files are allowed on the shared drive.
2. Set up the allowed types of files: Only the types of files approved by the administrator can be used with the shared drive.
3. Create a list of the file types: Make a list of all the acceptable file types on the shared drive, and keep it in a safe place.