Absolutely useless. All it does is say I am not registered, doesn't matter if I sign in with Google or any other way. Utter junk, like every other file transfer app. I guess the powers that be have just decided that we should not be allowed to transfer large files any more and any and every way of doing it is blocked or a substantial fee is charged as a deterrent. I have deleted the extension. Junk.
The plugin provides ad-free file transfer and link management for Gmail
It allows easy attachment of large files to emails, sharing PDFs directly from the PDF viewer, and sharing images by right-clicking
The features include no ads on all platforms, abundant link settings, and require a subscription for service