If you already have Google Drive or SharePoint connected to ChatGPT but still can't select files, don't rush to reauthorize it. There are three most common reasons for this problem: a browser extension blocking the file picker, you're looking for an old file picker that has been taken offline, or you're looking for a cross-organizational SharePoint/OneDrive link that you can't use directly.
Let's talk about the easiest layer to repair first. OpenAI's current help clearly mentions that browser extensions such as content filtering, ad blocking, and script blocking will directly cause the file picker to fail to load. So the first step is not to delete the account, but to open an incognito window and try again, or temporarily turn off extensions, especially privacy protection, script blocking, and company-installed browser security plugins.
If the incognito window can be opened, it can basically be an expansion problem. Instead of running naked forever, you can allowlist ChatGPT domains or temporarily turn off extensions when you need to select files.
The second high-frequency misunderstanding is to regard the "old file picker" as the current main entrance. OpenAI has integrated Google Drive and SharePoint into ChatGPT conversations more completely, and it is more common for new users to connect to Drive or SharePoint in Settings first, and then refer to files or paste links directly in the chat, rather than relying on the old pop-up file selector. If you look for OneDrive picker for old tutorials, it's easy to get more and more confused.
The third level is the authority boundary. The Help Center specifically mentions that SharePoint links generated by one organization cannot be used directly across to another organization. In other words, just because the file itself can be opened in SharePoint does not mean that ChatGPT will definitely be able to recognize and attach it successfully. Especially when company accounts, external visitor accounts, and personal accounts are mixed, it is most likely to run into this limitation.
A more stable order of investigation is:
1. Try again with an incognito window or close the extension.
2. Make sure you are using the new connector and not following the old file picker tutorial.
3. If it's SharePoint, check that the link isn't shared across your organization.
4. If it still doesn't work, download the file to the local area and then upload it, don't get stuck on the cloud path.
In a word, this kind of problem is often not ChatGPT "can't read the cloud disk", but the browser, old entrance, and organizational permissions are mixed together. Separate these three layers and you can usually find the real blockage quickly.
