Add new file to item / attach document not working properly

Hello @chris970! 👋

I'm sorry that you've run into trouble when adding files to 1Password. File attachments are indeed a new feature that we introduced with 1Password for Mac version 7.8.8 in October, they allow you to store files inside of your other items without the need to create a completely separate item for that file. At the moment file attachments are not yet supported on 1Password.com (this is why you're seeing the "This item has an unsupported field" message) and this is on our developer's radar as something to implement as soon as possible. I've added your comments to our internal work item for the feature so that they know that you'd like to see this added.

If you'd like to upload a file as a separate item and link it to another item then the process that you're using sounds correct:

1. Upload the file as its own Document item.
2. Use the Link Existing button from the edit screen for an item.
3. Locate the Document item you uploaded and link the two items together.

Please let me know if you have any questions. :)

ref: dev/b5/b5#14132