OneDrive – How to Write-Protect Files

I don't think there any restriction of the type of files you can upload but you can only edit or create Office files in the browser.

You can't do this.

What you can do is share the document or file you would otherwise send as an attachment.

1. Tick the checkbox next to the document filename
2. Click the Share link on the sidebar

From the Share dialog that pops up with various options, you can share directly with another person by emailing them.

Or you can click Get a link and select one of the options available:

• View only
• View and edit
• Make it public!

Then include the link in the body of your email.