If you don't want to get file shares from someone in Google Drive, Docs, Sheets, or Slides, you can block them. When you block someone:
- They won't be able to share files with you.
- You won't be able to share files with them, unless you unblock them first.
- They won't be able to access any of your files and you won't be able to access any of theirs.
- You no longer get comment notifications from them in Google Docs, Sheets, or Slides, unless you subscribe to notifications for all comments. If so, you continue to get notifications for comments from people you have blocked or have blocked you.
When you block or unblock someone, there may be a short delay for this to take effect in Google Drive. If you use Google Drive for work or school, you can’t block someone in your domain nor in a separate but trusted domain.
Block the file sharer
- Open the Gmail app.
- Open a Drive sharing email.
- At the bottom of the email, tap Block the sender.
Tip: At the top of the Gmail window, you may be prompted to select one of your accounts. - In the window, click Block.
Block the file owner
- Open the Drive app.
- At the top right of a file, tap Menu
.
- In the menu, tap Block {email}.
- In the window, tap Block.
.Unblock a person
- Open the Drive app.
- At the top right, tap your profile picture
Manage your Google Account.
- Tap People & sharing
- A list opens with accounts you blocked across Google products.
- Next to that person's name, select Remove
.
Manage your Google Account. 
.