I'm having trouble downloading from Google Drive on two networks. One is FTTP with a Vigor 2762 and the other FTTC with a Vigor 2862. Both have the latest UK firmware. In both cases downloads (but not uploads) fail after a few MB and fail to retry using Chrome. (They also fail in Edge and Firefox.) If I manually retry the download it collects another few MB and stalls again. In the case of the FTTP network these downloads work fine if the router is swapped out for the one supplied by the ISP. Is this a configuration issue on the DrayTek? It seems to be the only thing that doesn't work as expected!

I can't comment on other routers fixing it but I've known many problems with Google Drive over the years.

A different browser (not signed in to Google) has sometimes fixed it, but only if the share doesn't force a Google sign in.

My suspicion (and it's just that) is that it's in some way related to how much space you have free in your own Google account.